[
  {
    "Z": 1,
    "symbol": "H",
    "block": "s",
    "period": 1,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 2,
    "key_ratio": "{2}-fold diatomic",
    "gap_structure": "molecular gap",
    "void_character": "H\u2082 diatomic \u2014 the simplest molecule, {2}-fold bond, spherical packing at low T",
    "coherence_expected": "high within bond",
    "factor_3": false,
    "transport": "insulator (molecular)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "insulator (molecular)",
      "thermal_absorption": "N/A",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 2,
    "symbol": "He",
    "block": "s",
    "period": 1,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide (van der Waals)",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "blocked (node position \u2014 no metallic bonding)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "blocked (node position \u2014 no metallic bonding)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 3,
    "symbol": "Li",
    "block": "s",
    "period": 2,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families, broadband",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband (no {3}-fold threading)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband (no {3}-fold threading)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 4,
    "symbol": "Be",
    "block": "s",
    "period": 2,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable (c/a)",
    "void_character": "anisotropic, direction-dependent",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic (directional channels)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic (directional channels)",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 5,
    "symbol": "B",
    "block": "p",
    "period": 2,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 3,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "resolved (icosahedral)",
    "void_character": "B\u2081\u2082 icosahedral clusters \u2014 {5}-fold local, most uniform distribution, sphere-like but structured",
    "coherence_expected": "high (lockstep within cluster)",
    "factor_3": false,
    "transport": "semiconductor (cluster-to-cluster hopping)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "semiconductor (cluster-to-cluster hopping)",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 6,
    "symbol": "C",
    "block": "p",
    "period": 2,
    "d_pos": 0,
    "spectral_class": "single-mode",
    "eigenvalue_count": 1,
    "key_ratio": "N/A (single degenerate \u03bb=4)",
    "gap_structure": "frequency guillotine (gap ~5.5 eV)",
    "void_character": "tetrahedral \u2014 4 identical faces, one timing, destroys all other frequencies",
    "coherence_expected": "very high (lockstep, one note)",
    "factor_3": false,
    "transport": "insulator/semiconductor (silence between harmonics)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "zero \u2014 frequency guillotine, fractures before deforming",
      "transport": "insulator/semiconductor (silence between harmonics)",
      "thermal_absorption": "minimal \u2014 single channel, but that channel is very efficient",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "very low \u2014 single sealed mode",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 7,
    "symbol": "N",
    "block": "p",
    "period": 2,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 3,
    "key_ratio": "molecular",
    "gap_structure": "molecular gap (bond energy sets gap)",
    "void_character": "N\u2082 triple bond, strongest molecular bond",
    "coherence_expected": "high within molecule, low between",
    "factor_3": false,
    "transport": "insulator (molecular crystal)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "insulator (molecular crystal)",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 8,
    "symbol": "O",
    "block": "p",
    "period": 2,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 3,
    "key_ratio": "molecular ring",
    "gap_structure": "molecular gap",
    "void_character": "O\u2082 paramagnetic diatomic \u2014 {2}-fold",
    "coherence_expected": "moderate (ring coherence)",
    "factor_3": false,
    "transport": "insulator",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "insulator",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 9,
    "symbol": "F",
    "block": "p",
    "period": 2,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 2,
    "key_ratio": "{2}-fold diatomic",
    "gap_structure": "molecular gap",
    "void_character": "X\u2082 diatomic \u2014 {2}-fold bond, molecular crystal packing",
    "coherence_expected": "high within bond, low between molecules",
    "factor_3": false,
    "transport": "insulator (molecular)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "insulator (molecular)",
      "thermal_absorption": "N/A",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 10,
    "symbol": "Ne",
    "block": "p",
    "period": 2,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide (van der Waals)",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "blocked (node position \u2014 no metallic bonding)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "blocked (node position \u2014 no metallic bonding)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 11,
    "symbol": "Na",
    "block": "s",
    "period": 3,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families, broadband",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband (no {3}-fold threading)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband (no {3}-fold threading)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 12,
    "symbol": "Mg",
    "block": "s",
    "period": 3,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable (c/a)",
    "void_character": "anisotropic, direction-dependent",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic (directional channels)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic (directional channels)",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 13,
    "symbol": "Al",
    "block": "p",
    "period": 3,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "moderate-high",
    "factor_3": true,
    "transport": "selective channels",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 14,
    "symbol": "Si",
    "block": "p",
    "period": 3,
    "d_pos": 0,
    "spectral_class": "single-mode",
    "eigenvalue_count": 1,
    "key_ratio": "N/A (single degenerate \u03bb=4)",
    "gap_structure": "frequency guillotine (gap ~1.1 eV)",
    "void_character": "tetrahedral \u2014 4 identical faces, one timing, destroys all other frequencies",
    "coherence_expected": "very high (lockstep, one note)",
    "factor_3": false,
    "transport": "insulator/semiconductor (silence between harmonics)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "zero \u2014 frequency guillotine, fractures before deforming",
      "transport": "insulator/semiconductor (silence between harmonics)",
      "thermal_absorption": "minimal \u2014 single channel, but that channel is very efficient",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "very low \u2014 single sealed mode",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 15,
    "symbol": "P",
    "block": "p",
    "period": 3,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 3,
    "key_ratio": "molecular",
    "gap_structure": "molecular gap (bond energy sets gap)",
    "void_character": "P\u2084 tetrahedral molecule \u2014 {3}-fold local",
    "coherence_expected": "high within molecule, low between",
    "factor_3": false,
    "transport": "insulator (molecular crystal)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "insulator (molecular crystal)",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 16,
    "symbol": "S",
    "block": "p",
    "period": 3,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 3,
    "key_ratio": "molecular ring",
    "gap_structure": "molecular gap",
    "void_character": "S\u2088 crown ring \u2014 {2,3} molecular, most allotropes (~30)",
    "coherence_expected": "moderate (ring coherence)",
    "factor_3": false,
    "transport": "insulator",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "insulator",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 17,
    "symbol": "Cl",
    "block": "p",
    "period": 3,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 2,
    "key_ratio": "{2}-fold diatomic",
    "gap_structure": "molecular gap",
    "void_character": "X\u2082 diatomic \u2014 {2}-fold bond, molecular crystal packing",
    "coherence_expected": "high within bond, low between molecules",
    "factor_3": false,
    "transport": "insulator (molecular)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "insulator (molecular)",
      "thermal_absorption": "N/A",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 18,
    "symbol": "Ar",
    "block": "p",
    "period": 3,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide (van der Waals)",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "blocked (node position \u2014 no metallic bonding)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "blocked (node position \u2014 no metallic bonding)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 19,
    "symbol": "K",
    "block": "s",
    "period": 4,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families, broadband",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband (no {3}-fold threading)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband (no {3}-fold threading)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 20,
    "symbol": "Ca",
    "block": "s",
    "period": 4,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "moderate-high",
    "factor_3": true,
    "transport": "selective channels",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 21,
    "symbol": "Sc",
    "block": "d",
    "period": 4,
    "d_pos": 1,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable (c/a)",
    "void_character": "anisotropic",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 22,
    "symbol": "Ti",
    "block": "d",
    "period": 4,
    "d_pos": 2,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable (c/a)",
    "void_character": "anisotropic",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 23,
    "symbol": "V",
    "block": "d",
    "period": 4,
    "d_pos": 3,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong + consonant filling = SC candidate",
      "magnetism": "exchange stabilization at consonant filling",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 24,
    "symbol": "Cr",
    "block": "d",
    "period": 4,
    "d_pos": 4,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong + consonant filling = SC candidate",
      "magnetism": "exchange stabilization at consonant filling",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 25,
    "symbol": "Mn",
    "block": "d",
    "period": 4,
    "d_pos": 5,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "compressed doublet traps unpaired spins \u2014 ferromagnetic candidate",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 26,
    "symbol": "Fe",
    "block": "d",
    "period": 4,
    "d_pos": 6,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "compressed doublet traps unpaired spins \u2014 ferromagnetic candidate",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 27,
    "symbol": "Co",
    "block": "d",
    "period": 4,
    "d_pos": 7,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 28,
    "symbol": "Ni",
    "block": "d",
    "period": 4,
    "d_pos": 8,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective channels (best conductor geometry)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels (best conductor geometry)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 29,
    "symbol": "Cu",
    "block": "d",
    "period": 4,
    "d_pos": 9,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective channels (best conductor geometry)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels (best conductor geometry)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 30,
    "symbol": "Zn",
    "block": "d",
    "period": 4,
    "d_pos": 10,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (d10 screening)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 31,
    "symbol": "Ga",
    "block": "p",
    "period": 4,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 12,
    "key_ratio": "{7} overtone",
    "gap_structure": "partially unresolved",
    "void_character": "CN=7 \u2014 non-{2,3} coordination, 4D overtone bleeding into 3D",
    "coherence_expected": "low",
    "factor_3": false,
    "transport": "poor metal (geometric compromise)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "complex \u2014 many competing modes",
      "transport": "poor metal (geometric compromise)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 32,
    "symbol": "Ge",
    "block": "p",
    "period": 4,
    "d_pos": 0,
    "spectral_class": "single-mode",
    "eigenvalue_count": 1,
    "key_ratio": "N/A (single degenerate \u03bb=4)",
    "gap_structure": "frequency guillotine (gap ~0.67 eV)",
    "void_character": "tetrahedral \u2014 4 identical faces, one timing, destroys all other frequencies",
    "coherence_expected": "very high (lockstep, one note)",
    "factor_3": false,
    "transport": "insulator/semiconductor (silence between harmonics)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "zero \u2014 frequency guillotine, fractures before deforming",
      "transport": "insulator/semiconductor (silence between harmonics)",
      "thermal_absorption": "minimal \u2014 single channel, but that channel is very efficient",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "very low \u2014 single sealed mode",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 33,
    "symbol": "As",
    "block": "p",
    "period": 4,
    "d_pos": 0,
    "spectral_class": "partial-{2,3}",
    "eigenvalue_count": 4,
    "key_ratio": "partial",
    "gap_structure": "moderate (layered)",
    "void_character": "2D\u21923D bridge \u2014 {3} in-plane + weak 3D coupling",
    "coherence_expected": "moderate (in-plane) / low (cross-plane)",
    "factor_3": true,
    "transport": "semimetallic (band overlap)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "semimetallic (band overlap)",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 34,
    "symbol": "Se",
    "block": "p",
    "period": 4,
    "d_pos": 0,
    "spectral_class": "chain",
    "eigenvalue_count": 3,
    "key_ratio": "linear ({2}-fold)",
    "gap_structure": "narrow directional gap",
    "void_character": "helical polymer chains \u2014 1D geometry in 3D space",
    "coherence_expected": "moderate along chain, low between",
    "factor_3": false,
    "transport": "semiconductor (chain \u2192 chain hopping)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "semiconductor (chain \u2192 chain hopping)",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 35,
    "symbol": "Br",
    "block": "p",
    "period": 4,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 2,
    "key_ratio": "{2}-fold diatomic",
    "gap_structure": "molecular gap",
    "void_character": "X\u2082 diatomic \u2014 {2}-fold bond, molecular crystal packing",
    "coherence_expected": "high within bond, low between molecules",
    "factor_3": false,
    "transport": "insulator (molecular)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "insulator (molecular)",
      "thermal_absorption": "N/A",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 36,
    "symbol": "Kr",
    "block": "p",
    "period": 4,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide (van der Waals)",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "blocked (node position \u2014 no metallic bonding)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "blocked (node position \u2014 no metallic bonding)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 37,
    "symbol": "Rb",
    "block": "s",
    "period": 5,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families, broadband",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband (no {3}-fold threading)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband (no {3}-fold threading)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 38,
    "symbol": "Sr",
    "block": "s",
    "period": 5,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "moderate-high",
    "factor_3": true,
    "transport": "selective channels",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 39,
    "symbol": "Y",
    "block": "d",
    "period": 5,
    "d_pos": 1,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable (c/a)",
    "void_character": "anisotropic",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 40,
    "symbol": "Zr",
    "block": "d",
    "period": 5,
    "d_pos": 2,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable (c/a)",
    "void_character": "anisotropic",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 41,
    "symbol": "Nb",
    "block": "d",
    "period": 5,
    "d_pos": 3,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong + consonant filling = SC candidate",
      "magnetism": "exchange stabilization at consonant filling",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 42,
    "symbol": "Mo",
    "block": "d",
    "period": 5,
    "d_pos": 4,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong + consonant filling = SC candidate",
      "magnetism": "exchange stabilization at consonant filling",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 43,
    "symbol": "Tc",
    "block": "d",
    "period": 5,
    "d_pos": 5,
    "spectral_class": "transitional (dense\u2192moderate)",
    "eigenvalue_count": 8,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "transitional (narrowing gaps opening)",
    "void_character": "14-face, two timing families \u2192 corrected by acceleration ramp",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 44,
    "symbol": "Ru",
    "block": "d",
    "period": 5,
    "d_pos": 6,
    "spectral_class": "transitional (dense\u2192moderate)",
    "eigenvalue_count": 8,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "transitional (narrowing gaps opening)",
    "void_character": "14-face, two timing families \u2192 corrected by acceleration ramp",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 45,
    "symbol": "Rh",
    "block": "d",
    "period": 5,
    "d_pos": 7,
    "spectral_class": "transitional (dense\u2192moderate)",
    "eigenvalue_count": 8,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "transitional (narrowing gaps opening)",
    "void_character": "14-face, two timing families \u2192 corrected by acceleration ramp",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 46,
    "symbol": "Pd",
    "block": "d",
    "period": 5,
    "d_pos": 8,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective channels (best conductor geometry)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels (best conductor geometry)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 47,
    "symbol": "Ag",
    "block": "d",
    "period": 5,
    "d_pos": 9,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective channels (best conductor geometry)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels (best conductor geometry)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 48,
    "symbol": "Cd",
    "block": "d",
    "period": 5,
    "d_pos": 10,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (d10 screening)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 49,
    "symbol": "In",
    "block": "p",
    "period": 5,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "moderate-high",
    "factor_3": true,
    "transport": "selective channels",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 50,
    "symbol": "Sn",
    "block": "p",
    "period": 5,
    "d_pos": 0,
    "spectral_class": "single-mode \u2192 resolved-mixed",
    "eigenvalue_count": 1,
    "key_ratio": "transitional",
    "gap_structure": "temperature-dependent (alpha=guillotine, beta=metallic)",
    "void_character": "phase boundary \u2014 straddles single-mode and resolved",
    "coherence_expected": "phase-dependent",
    "factor_3": false,
    "transport": "semiconductor (alpha) / conductor (beta)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "zero \u2014 frequency guillotine, fractures before deforming",
      "transport": "semiconductor (alpha) / conductor (beta)",
      "thermal_absorption": "minimal \u2014 single channel, but that channel is very efficient",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "very low \u2014 single sealed mode",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 51,
    "symbol": "Sb",
    "block": "p",
    "period": 5,
    "d_pos": 0,
    "spectral_class": "partial-{2,3}",
    "eigenvalue_count": 4,
    "key_ratio": "partial",
    "gap_structure": "moderate (layered)",
    "void_character": "2D\u21923D bridge \u2014 {3} in-plane + weak 3D coupling",
    "coherence_expected": "moderate (in-plane) / low (cross-plane)",
    "factor_3": true,
    "transport": "semimetallic (band overlap)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "semimetallic (band overlap)",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 52,
    "symbol": "Te",
    "block": "p",
    "period": 5,
    "d_pos": 0,
    "spectral_class": "chain",
    "eigenvalue_count": 3,
    "key_ratio": "linear ({2}-fold)",
    "gap_structure": "narrow directional gap",
    "void_character": "helical polymer chains \u2014 1D geometry in 3D space",
    "coherence_expected": "moderate along chain, low between",
    "factor_3": false,
    "transport": "semiconductor (chain \u2192 chain hopping)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "semiconductor (chain \u2192 chain hopping)",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 53,
    "symbol": "I",
    "block": "p",
    "period": 5,
    "d_pos": 0,
    "spectral_class": "molecular-{5}",
    "eigenvalue_count": 2,
    "key_ratio": "{2}-fold diatomic",
    "gap_structure": "molecular gap",
    "void_character": "X\u2082 diatomic \u2014 {2}-fold bond, molecular crystal packing",
    "coherence_expected": "high within bond, low between molecules",
    "factor_3": false,
    "transport": "insulator (molecular)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "insulator (molecular)",
      "thermal_absorption": "N/A",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 54,
    "symbol": "Xe",
    "block": "p",
    "period": 5,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide (van der Waals)",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "blocked (node position \u2014 no metallic bonding)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "blocked (node position \u2014 no metallic bonding)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 55,
    "symbol": "Cs",
    "block": "s",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families, broadband",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband (no {3}-fold threading)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband (no {3}-fold threading)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 56,
    "symbol": "Ba",
    "block": "s",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "broadband absorber",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 57,
    "symbol": "La",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 58,
    "symbol": "Ce",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 59,
    "symbol": "Pr",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 60,
    "symbol": "Nd",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 61,
    "symbol": "Pm",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 62,
    "symbol": "Sm",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "partial-{2,3}",
    "eigenvalue_count": 4,
    "key_ratio": "partial",
    "gap_structure": "moderate",
    "void_character": "layered (9R stacking)",
    "coherence_expected": "moderate",
    "factor_3": true,
    "transport": "semimetallic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "semimetallic",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 63,
    "symbol": "Eu",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "broadband (divalent f-anomaly)",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 64,
    "symbol": "Gd",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 65,
    "symbol": "Tb",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 66,
    "symbol": "Dy",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 67,
    "symbol": "Ho",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 68,
    "symbol": "Er",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 69,
    "symbol": "Tm",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 70,
    "symbol": "Yb",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "broadband (divalent f-anomaly)",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 71,
    "symbol": "Lu",
    "block": "f",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (lanthanide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 72,
    "symbol": "Hf",
    "block": "d",
    "period": 6,
    "d_pos": 2,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable (c/a)",
    "void_character": "anisotropic",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 73,
    "symbol": "Ta",
    "block": "d",
    "period": 6,
    "d_pos": 3,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong + consonant filling = SC candidate",
      "magnetism": "exchange stabilization at consonant filling",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 74,
    "symbol": "W",
    "block": "d",
    "period": 6,
    "d_pos": 4,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong + consonant filling = SC candidate",
      "magnetism": "exchange stabilization at consonant filling",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 75,
    "symbol": "Re",
    "block": "d",
    "period": 6,
    "d_pos": 5,
    "spectral_class": "transitional (dense\u2192moderate)",
    "eigenvalue_count": 8,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "transitional (narrowing gaps opening)",
    "void_character": "14-face, two timing families \u2192 corrected by acceleration ramp",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 76,
    "symbol": "Os",
    "block": "d",
    "period": 6,
    "d_pos": 6,
    "spectral_class": "transitional (dense\u2192moderate)",
    "eigenvalue_count": 8,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "transitional (narrowing gaps opening)",
    "void_character": "14-face, two timing families \u2192 corrected by acceleration ramp",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 77,
    "symbol": "Ir",
    "block": "d",
    "period": 6,
    "d_pos": 7,
    "spectral_class": "transitional (dense\u2192moderate)",
    "eigenvalue_count": 8,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "transitional (narrowing gaps opening)",
    "void_character": "14-face, two timing families \u2192 corrected by acceleration ramp",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 78,
    "symbol": "Pt",
    "block": "d",
    "period": 6,
    "d_pos": 8,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective channels (best conductor geometry)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels (best conductor geometry)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 79,
    "symbol": "Au",
    "block": "d",
    "period": 6,
    "d_pos": 9,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective channels (best conductor geometry)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels (best conductor geometry)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 80,
    "symbol": "Hg",
    "block": "d",
    "period": 6,
    "d_pos": 10,
    "spectral_class": "partial-{2,3} (screened)",
    "eigenvalue_count": 5,
    "key_ratio": "{2,3}",
    "gap_structure": "reduced (d10 screening weakened s-bond)",
    "void_character": "anisotropic (d10 screening) \u2192 d10 screening broke archetype",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "moderate",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 81,
    "symbol": "Tl",
    "block": "p",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 82,
    "symbol": "Pb",
    "block": "p",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide (last stable Z)",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective channels (superconductor at 7.2K)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels (superconductor at 7.2K)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 83,
    "symbol": "Bi",
    "block": "p",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "partial-{2,3}",
    "eigenvalue_count": 4,
    "key_ratio": "partial",
    "gap_structure": "moderate (layered)",
    "void_character": "2D\u21923D bridge \u2014 {3} in-plane + weak 3D coupling",
    "coherence_expected": "moderate (in-plane) / low (cross-plane)",
    "factor_3": true,
    "transport": "semimetallic (band overlap)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "semimetallic (band overlap)",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 84,
    "symbol": "Po",
    "block": "p",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "minimal-metallic",
    "eigenvalue_count": 3,
    "key_ratio": "minimal {2,3}",
    "gap_structure": "basic",
    "void_character": "simple cubic \u2014 CN=6=2\u00d73, the MINIMUM metallic void. The spiral has stretched so far only the simplest {2,3} product survives.",
    "coherence_expected": "moderate",
    "factor_3": true,
    "transport": "poor metal (minimal channels)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "poor metal (minimal channels)",
      "thermal_absorption": "poor \u2014 few channels",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 85,
    "symbol": "At",
    "block": "p",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "unknown",
    "eigenvalue_count": 0,
    "key_ratio": "N/A",
    "gap_structure": "unmeasured",
    "void_character": "no bulk solid ever produced (t1/2 = 8 hr)",
    "coherence_expected": "N/A",
    "factor_3": false,
    "transport": "N/A",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "N/A",
      "transport": "N/A",
      "thermal_absorption": "N/A",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 86,
    "symbol": "Rn",
    "block": "p",
    "period": 6,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide (van der Waals)",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "blocked (node position \u2014 no metallic bonding)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "blocked (node position \u2014 no metallic bonding)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 87,
    "symbol": "Fr",
    "block": "s",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families, broadband",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband (no {3}-fold threading)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband (no {3}-fold threading)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 88,
    "symbol": "Ra",
    "block": "s",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "broadband absorber",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 89,
    "symbol": "Ac",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 90,
    "symbol": "Th",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective (long-lived actinide)",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 91,
    "symbol": "Pa",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 19,
    "key_ratio": "dense",
    "gap_structure": "unresolved",
    "void_character": "4D boundary \u2014 approaching continuous",
    "coherence_expected": "low",
    "factor_3": false,
    "transport": "poor (unresolved spectrum)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "complex \u2014 many competing modes",
      "transport": "poor (unresolved spectrum)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "approaching continuous spectrum \u2014 potentially unstable"
    }
  },
  {
    "Z": 92,
    "symbol": "U",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 19,
    "key_ratio": "dense",
    "gap_structure": "unresolved",
    "void_character": "4D boundary \u2014 approaching continuous",
    "coherence_expected": "low",
    "factor_3": false,
    "transport": "poor (unresolved spectrum)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "complex \u2014 many competing modes",
      "transport": "poor (unresolved spectrum)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "approaching continuous spectrum \u2014 potentially unstable"
    }
  },
  {
    "Z": 93,
    "symbol": "Np",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 19,
    "key_ratio": "dense",
    "gap_structure": "unresolved",
    "void_character": "4D boundary \u2014 approaching continuous",
    "coherence_expected": "low",
    "factor_3": false,
    "transport": "poor (unresolved spectrum)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "complex \u2014 many competing modes",
      "transport": "poor (unresolved spectrum)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "approaching continuous spectrum \u2014 potentially unstable"
    }
  },
  {
    "Z": 94,
    "symbol": "Pu",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 30,
    "key_ratio": "shattered",
    "gap_structure": "unresolved",
    "void_character": "4D boundary \u2014 maximum frustration (6+ allotropes)",
    "coherence_expected": "very low",
    "factor_3": false,
    "transport": "poor (geometric instability)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "unstable \u2014 approaching continuous spectrum",
      "transport": "poor (geometric instability)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "approaching continuous spectrum \u2014 potentially unstable"
    }
  },
  {
    "Z": 95,
    "symbol": "Am",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 96,
    "symbol": "Cm",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 97,
    "symbol": "Bk",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 98,
    "symbol": "Cf",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 99,
    "symbol": "Es",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 100,
    "symbol": "Fm",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 101,
    "symbol": "Md",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 102,
    "symbol": "No",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 103,
    "symbol": "Lr",
    "block": "f",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable",
    "void_character": "anisotropic (heavy actinide)",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 104,
    "symbol": "Rf",
    "block": "d",
    "period": 7,
    "d_pos": 2,
    "spectral_class": "moderate",
    "eigenvalue_count": 7,
    "key_ratio": "{2,3}",
    "gap_structure": "tunable (c/a)",
    "void_character": "anisotropic",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 105,
    "symbol": "Db",
    "block": "d",
    "period": 7,
    "d_pos": 3,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong + consonant filling = SC candidate",
      "magnetism": "exchange stabilization at consonant filling",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 106,
    "symbol": "Sg",
    "block": "d",
    "period": 7,
    "d_pos": 4,
    "spectral_class": "dense",
    "eigenvalue_count": 9,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "narrow",
    "void_character": "14-face, two timing families",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong + consonant filling = SC candidate",
      "magnetism": "exchange stabilization at consonant filling",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 107,
    "symbol": "Bh",
    "block": "d",
    "period": 7,
    "d_pos": 5,
    "spectral_class": "transitional (dense\u2192moderate)",
    "eigenvalue_count": 8,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "transitional (narrowing gaps opening)",
    "void_character": "14-face, two timing families \u2192 corrected by acceleration ramp",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 108,
    "symbol": "Hs",
    "block": "d",
    "period": 7,
    "d_pos": 6,
    "spectral_class": "transitional (dense\u2192moderate)",
    "eigenvalue_count": 8,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "transitional (narrowing gaps opening)",
    "void_character": "14-face, two timing families \u2192 corrected by acceleration ramp",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 109,
    "symbol": "Mt",
    "block": "d",
    "period": 7,
    "d_pos": 7,
    "spectral_class": "transitional (dense\u2192moderate)",
    "eigenvalue_count": 8,
    "key_ratio": "\u03c6\u00b2",
    "gap_structure": "transitional (narrowing gaps opening)",
    "void_character": "14-face, two timing families \u2192 corrected by acceleration ramp",
    "coherence_expected": "moderate",
    "factor_3": false,
    "transport": "broadband",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "temperature-dependent \u2014 narrow gaps lock at low T",
      "transport": "broadband",
      "thermal_absorption": "good \u2014 moderate channels",
      "phonon_coupling": "moderate",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 110,
    "symbol": "Ds",
    "block": "d",
    "period": 7,
    "d_pos": 8,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective channels (best conductor geometry)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels (best conductor geometry)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 111,
    "symbol": "Rg",
    "block": "d",
    "period": 7,
    "d_pos": 9,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "selective channels (best conductor geometry)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "selective channels (best conductor geometry)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  },
  {
    "Z": 112,
    "symbol": "Cn",
    "block": "d",
    "period": 7,
    "d_pos": 10,
    "spectral_class": "partial-{2,3} (screened)",
    "eigenvalue_count": 5,
    "key_ratio": "{2,3}",
    "gap_structure": "reduced (d10 screening weakened s-bond)",
    "void_character": "anisotropic (d10 screening) \u2192 d10 screening broke archetype",
    "coherence_expected": "low-moderate",
    "factor_3": true,
    "transport": "anisotropic",
    "correction_strain": true,
    "corrected": true,
    "properties": {
      "deformation_tolerance": "variable \u2014 depends on gap tuning",
      "transport": "anisotropic",
      "thermal_absorption": "moderate",
      "phonon_coupling": "minimal",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "moderate",
      "stability": "moderate stability"
    }
  },
  {
    "Z": 113,
    "symbol": "Nh",
    "block": "p",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 19,
    "key_ratio": "dense",
    "gap_structure": "unresolved (4D boundary)",
    "void_character": "superheavy \u2014 deep 4D boundary, predicted geometric instability",
    "coherence_expected": "very low",
    "factor_3": false,
    "transport": "unknown (too short-lived to measure)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "complex \u2014 many competing modes",
      "transport": "unknown (too short-lived to measure)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "approaching continuous spectrum \u2014 potentially unstable"
    }
  },
  {
    "Z": 114,
    "symbol": "Fl",
    "block": "p",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 19,
    "key_ratio": "dense",
    "gap_structure": "unresolved (4D boundary)",
    "void_character": "superheavy \u2014 deep 4D boundary, predicted geometric instability",
    "coherence_expected": "very low",
    "factor_3": false,
    "transport": "unknown (too short-lived to measure)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "complex \u2014 many competing modes",
      "transport": "unknown (too short-lived to measure)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "approaching continuous spectrum \u2014 potentially unstable"
    }
  },
  {
    "Z": 115,
    "symbol": "Mc",
    "block": "p",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 19,
    "key_ratio": "dense",
    "gap_structure": "unresolved (4D boundary)",
    "void_character": "superheavy \u2014 deep 4D boundary, predicted geometric instability",
    "coherence_expected": "very low",
    "factor_3": false,
    "transport": "unknown (too short-lived to measure)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "complex \u2014 many competing modes",
      "transport": "unknown (too short-lived to measure)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "approaching continuous spectrum \u2014 potentially unstable"
    }
  },
  {
    "Z": 116,
    "symbol": "Lv",
    "block": "p",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 19,
    "key_ratio": "dense",
    "gap_structure": "unresolved (4D boundary)",
    "void_character": "superheavy \u2014 deep 4D boundary, predicted geometric instability",
    "coherence_expected": "very low",
    "factor_3": false,
    "transport": "unknown (too short-lived to measure)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "complex \u2014 many competing modes",
      "transport": "unknown (too short-lived to measure)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "approaching continuous spectrum \u2014 potentially unstable"
    }
  },
  {
    "Z": 117,
    "symbol": "Ts",
    "block": "p",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "complex",
    "eigenvalue_count": 19,
    "key_ratio": "dense",
    "gap_structure": "unresolved (4D boundary)",
    "void_character": "superheavy \u2014 deep 4D boundary, predicted geometric instability",
    "coherence_expected": "very low",
    "factor_3": false,
    "transport": "unknown (too short-lived to measure)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "complex \u2014 many competing modes",
      "transport": "unknown (too short-lived to measure)",
      "thermal_absorption": "excellent \u2014 many channels absorb amplitude",
      "phonon_coupling": "strong \u2014 dense spectrum enables coupling",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "high \u2014 dense spectrum provides many bonding entry points",
      "stability": "approaching continuous spectrum \u2014 potentially unstable"
    }
  },
  {
    "Z": 118,
    "symbol": "Og",
    "block": "p",
    "period": 7,
    "d_pos": 0,
    "spectral_class": "resolved-mixed",
    "eigenvalue_count": 5,
    "key_ratio": "mixed",
    "gap_structure": "wide",
    "void_character": "selective waveguide (van der Waals)",
    "coherence_expected": "high",
    "factor_3": true,
    "transport": "blocked (node position \u2014 no metallic bonding)",
    "corrected": false,
    "properties": {
      "deformation_tolerance": "high \u2014 wide eigenvalue gaps absorb strain",
      "transport": "blocked (node position \u2014 no metallic bonding)",
      "thermal_absorption": "moderate",
      "phonon_coupling": "weak \u2014 wide gaps inhibit intermode transfer",
      "magnetism": "no geometric trap for unpaired spins",
      "chemical_accessibility": "low \u2014 resolved spectrum, noble",
      "stability": "resolved resonance \u2014 stable geometry"
    }
  }
]