{
  "schema": "gizah-materials-v1",
  "note": "steen → thermodynamica → frequentie → sanskriet mapping",
  "base_freq_method": "f = c / (λ * sqrt(density)) → afgerond naar dichtstbijzijnde muziekfrequentie",
  "materials": [
    {
      "id": "aswan_graniet",
      "name_nl": "Rood Aswan Graniet",
      "name_en": "Red Aswan Granite",
      "origin": "Aswan, ~800km zuidelijk",
      "chambers": [
        "kings"
      ],
      "thermo": {
        "density_kg_m3": 2650,
        "thermal_conductivity_w_mk": 2.5,
        "specific_heat_j_kgk": 790,
        "youngs_modulus_gpa": 50,
        "speed_of_sound_m_s": 5000,
        "melting_point_c": 1215,
        "color": "#cc3333",
        "reflectivity": 0.3
      },
      "acoustic": {
        "base_freq_hz": 370,
        "note": "F#",
        "resonance_quality": "high",
        "damping": "low",
        "harmonic_series": [
          370,
          740,
          1110,
          1480
        ],
        "notes": "King's Chamber ≈ 370 Hz (F#) — natuurlijke resonantie"
      },
      "sanskrit": {
        "mapping_method": "freq → Gaṇa groep",
        "freq_370": {
          "phoneme": "द (da)",
          "gana": "अन्तस्थ (Antasṭha)",
          "varna": "madhya (midden)",
          "sharaada": 8,
          "energy": "aardse stabiliteit + beweging",
          "note": "D = daadwerkelijke beweging, grondslag"
        },
        "element": "पृथ्वी (Prithvī = aarde)",
        "tattva": "aarde + vuur (graniet = verhard door hitse)",
        "mantra_seed": "ह्रీं (hrīṁ)"
      },
      "symbolic": {
        "meaning": "kracht, stabiliteit, kracht van aarde",
        "pyramid_role": "core bescherming (King's = kern)",
        "thermo_role": "hitseopslag → langzame afgifte"
      }
    },
    {
      "id": "tura_kalksteen",
      "name_nl": "Witte Tura Kalksteen",
      "name_en": "White Tura Limestone",
      "origin": "Tura, noordelijk Giza",
      "chambers": [
        "queens",
        "gallery",
        "outer_casing"
      ],
      "thermo": {
        "density_kg_m3": 2300,
        "thermal_conductivity_w_mk": 1.8,
        "specific_heat_j_kgk": 880,
        "youngs_modulus_gpa": 15,
        "speed_of_sound_m_s": 3200,
        "melting_point_c": 1300,
        "color": "#e8e4d8",
        "reflectivity": 0.85
      },
      "acoustic": {
        "base_freq_hz": 440,
        "note": "A4",
        "resonance_quality": "medium",
        "damping": "medium",
        "harmonic_series": [
          440,
          880,
          1320,
          1760
        ],
        "notes": "Queen's Chamber + Grand Gallery — A4 = concert tuning"
      },
      "sanskrit": {
        "mapping_method": "freq → Gaṇa groep",
        "freq_440": {
          "phoneme": "न (na)",
          "gana": "अन्तस्थ (Antasṭha)",
          "varna": "madhya (midden)",
          "sharaada": 4,
          "energy": "verbinding, structuur",
          "note": "N = structuur, netwerken"
        },
        "element": "पृथ्वी + वायु (Prithvī + Vāyu = aarde + lucht)",
        "tattva": "aarde + lucht (kalksteen = licht, poreus)",
        "mantra_seed": "नमः (namaḥ)"
      },
      "symbolic": {
        "meaning": "zuiverheid, licht, reflectie",
        "pyramid_role": "bescherming + lichtreflectie",
        "thermo_role": "isolatie → lage warmtegeleidbaarheid"
      }
    },
    {
      "id": "mokattam_kalksteen",
      "name_nl": "Mokattam Kalksteen (Core)",
      "name_en": "Mokattam Limestone (Core Blocks)",
      "origin": "lokale Giza quarry",
      "chambers": [
        "core_structure"
      ],
      "thermo": {
        "density_kg_m3": 2200,
        "thermal_conductivity_w_mk": 1.6,
        "specific_heat_j_kgk": 900,
        "youngs_modulus_gpa": 12,
        "speed_of_sound_m_s": 2800,
        "melting_point_c": 1300,
        "color": "#b8a888",
        "reflectivity": 0.4
      },
      "acoustic": {
        "base_freq_hz": 220,
        "note": "A3",
        "resonance_quality": "low",
        "damping": "high",
        "harmonic_series": [
          220,
          440,
          660,
          880
        ],
        "notes": "Core massa — lage frequentie, demping"
      },
      "sanskrit": {
        "mapping_method": "freq → Gaṇa groep",
        "freq_220": {
          "phoneme": "म (ma)",
          "gana": "आन्त (Ānta / labiale)",
          "varna": "guru (zwaar)",
          "sharaada": 2,
          "energy": "massa, fundament",
          "note": "M = moederschap, fundament"
        },
        "element": "पृथ्वी (Prithvī = aarde)",
        "tattva": "pure aarde (structuur)",
        "mantra_seed": "म्रं (mraṁ)"
      },
      "symbolic": {
        "meaning": "massa, fundament, structuur",
        "pyramid_role": "hoofdmassa (meeste blokken)",
        "thermo_role": "thermische massa → temperatuurstabilisatie"
      }
    },
    {
      "id": "basalt",
      "name_nl": "Basalt",
      "name_en": "Basalt",
      "origin": "verschillende locaties",
      "chambers": [
        "underground_floor",
        "corridor_floor"
      ],
      "thermo": {
        "density_kg_m3": 2900,
        "thermal_conductivity_w_mk": 2.0,
        "specific_heat_j_kgk": 840,
        "youngs_modulus_gpa": 30,
        "speed_of_sound_m_s": 4200,
        "melting_point_c": 1100,
        "color": "#222222",
        "reflectivity": 0.1
      },
      "acoustic": {
        "base_freq_hz": 185,
        "note": "F#3",
        "resonance_quality": "medium-high",
        "damping": "low",
        "harmonic_series": [
          185,
          370,
          555,
          740
        ],
        "notes": "Ondergrond — F#3 (octaaf onder King's F#4)"
      },
      "sanskrit": {
        "mapping_method": "freq → Gaṇa groep",
        "freq_185": {
          "phoneme": "ब (ba)",
          "gana": "ओष्ठम्य (Oṣṭhya / labiale)",
          "varna": "guru (zwaar)",
          "sharaada": 1,
          "energy": "diepe grondslag, vulkanisch",
          "note": "B = begin, basis, vulkanische kracht"
        },
        "element": "अग्नि (Agni = vuur)",
        "tattva": "verhard vuur (gestolde lava)",
        "mantra_seed": "भ्रां (bhrāṁ)"
      },
      "symbolic": {
        "meaning": "vulkanische kracht, diepe aarde",
        "pyramid_role": "ondergrondse vloeren, verbindingen",
        "thermo_role": "hitsegeleiding naar beneden → grond"
      }
    },
    {
      "id": "albast",
      "name_nl": "Albast",
      "name_en": "Alabaster",
      "origin": "Hatnub / diverse",
      "chambers": [
        "passages",
        "decoratie"
      ],
      "thermo": {
        "density_kg_m3": 2100,
        "thermal_conductivity_w_mk": 1.2,
        "specific_heat_j_kgk": 920,
        "youngs_modulus_gpa": 8,
        "speed_of_sound_m_s": 2400,
        "melting_point_c": 1460,
        "color": "#f0e8d0",
        "reflectivity": 0.9
      },
      "acoustic": {
        "base_freq_hz": 528,
        "note": "Bb5 (≈ B5)",
        "resonance_quality": "high",
        "damping": "very low",
        "harmonic_series": [
          528,
          1056,
          1584,
          2112
        ],
        "notes": "528 Hz = 'DNA-reparatie frequentie' (discussie)"
      },
      "sanskrit": {
        "mapping_method": "freq → Gaṇa groep",
        "freq_528": {
          "phoneme": "श (śa)",
          "gana": "उष्म (Uṣma / sibilant)",
          "varna": "tīvra (scherp)",
          "sharaada": 3,
          "energy": "licht, energie, transformatie",
          "note": "Śa = Shiva-energie, transformatie"
        },
        "element": "तेजस् (Tejas = licht/stralend)",
        "tattva": "licht + aarde (transparantie)",
        "mantra_seed": "श्रीं (śrīṁ)"
      },
      "symbolic": {
        "meaning": "transparantie, licht, transformatie",
        "pyramid_role": "passages + decoratie",
        "thermo_role": "lichtreflectie → temperatuur controleren"
      }
    },
    {
      "id": "elektro",
      "name_nl": "Elektro (Goud-Koper)",
      "name_en": "Electrum (Gold-Copper Alloy)",
      "origin": "Nijdelta / Egypten",
      "chambers": [
        "piemion"
      ],
      "thermo": {
        "density_kg_m3": 10700,
        "thermal_conductivity_w_mk": 280,
        "specific_heat_j_kgk": 130,
        "youngs_modulus_gpa": 78,
        "speed_of_sound_m_s": 3500,
        "melting_point_c": 1020,
        "color": "#ffd700",
        "reflectivity": 0.95
      },
      "acoustic": {
        "base_freq_hz": 512,
        "note": "C5 (scientifiek)",
        "resonance_quality": "very high",
        "damping": "extremely low",
        "harmonic_series": [
          512,
          1024,
          1536,
          2048
        ],
        "notes": "512 Hz = C5 = machina mundi frequentie, octaaf boven 256 (C4)"
      },
      "sanskrit": {
        "mapping_method": "freq → Gaṇa groep",
        "freq_512": {
          "phoneme": "स (sa)",
          "gana": "उष्म (Uṣma / sibilant)",
          "varna": "tīvra (scherp)",
          "sharaada": 5,
          "energy": "zonnestraling, kosmische verbinding",
          "note": "S = zon, licht, kosmische bron"
        },
        "element": "आकाश (Ākāśa = ether/ruimte)",
        "tattva": "licht + ether (reflectie → kosmos)",
        "mantra_seed": "स्वीं (svīṁ)"
      },
      "symbolic": {
        "meaning": "goddelijk licht, zonnestraal, kosmische verbinding",
        "pyramid_role": "piemion bekleding — zonnespiegel + resonantie",
        "thermo_role": "extreme reflectie → licht naar hemel, warmte naar grond"
      }
    }
  ],
  "material_matrix": {
    "freq_range": "185-528 Hz (ondergrond → buiten)",
    "pattern": "oplopend: basalt → core → graniet → kalksteen → albast",
    "octave_map": {
      "F#3 (185)": "basalt (ondergrond)",
      "A3 (220)": "core kalksteen",
      "F#4 (370)": "King's graniet",
      "A4 (440)": "Queen's/Tura kalksteen",
      "Bb5 (528)": "albast (lichtste)"
    },
    "sanskrit_chain": "ब → म → द → न → श (ba → ma → da → na → śa)",
    "sanskrit_meaning": "basis → massa → daad → structuur → licht",
    "thermo_flow": "hitsebron (onder) → opslag (core) → resonantie (kings) → isolatie (gallery) → reflectie (buiten)"
  },
  "structure_materials": {
    "note": "Per onderdeel: welke steen waar. Bekend + afgeleid.",
    "structures": [
      {
        "id": "entrance_exterior",
        "name_nl": "Externe ingang (Oostzijde)",
        "zRC": 22.9,
        "material": "tura_kalksteen",
        "dims_RC": {
          "w": 3.4,
          "h": 3.4
        },
        "dims_m": {
          "w": 1.8,
          "h": 1.8
        },
        "note": "Groot graniet portaal (2 stenen, elk ~16 ton)",
        "material_actual": "aswan_graniet",
        "ratio": "1:1 (vierkant)",
        "weight_ton": 16,
        "portal_stones": {
          "count": 2,
          "material": "aswan_graniet",
          "weight_ton_each": 16,
          "note": "Twee enorme graniet portaal stenen. Oorspronkelijk als sluiting. Uniek: graniet op oostgevel (anders kalksteen)."
        }
      },
      {
        "id": "descending_passage",
        "name_nl": "Afdalende Gang",
        "zStartRC": 22.9,
        "zEndRC": -7.6,
        "material": "mokattam_kalksteen",
        "dims_RC": {
          "w": 5.7,
          "h": 23.4,
          "d": 5.7
        },
        "dims_m": {
          "w": 1.0,
          "h": 12.3,
          "d": 1.0
        },
        "note": "26° omlaag. Smal kanaal door core.",
        "ratio": "26° = halve piramide hoek",
        "angle_deg": -26
      },
      {
        "id": "subterranean_chamber",
        "name_nl": "Ondergrondse Kamer",
        "zRC": -19.1,
        "material": "mokattam_kalksteen",
        "dims_RC": {
          "w": 10.3,
          "d": 7.3,
          "h": 6.7
        },
        "dims_m": {
          "w": 5.4,
          "d": 3.8,
          "h": 3.5
        },
        "note": "Onvoltooide kamer + verticale schacht naar beneden.",
        "ratio": "≈ 3:2:1",
        "material_floor": "basalt",
        "unfinished": true
      },
      {
        "id": "well_shaft",
        "name_nl": "Put-schacht",
        "zStartRC": -7.6,
        "zEndRC": -19.1,
        "material": "mokattam_kalksteen",
        "dims_RC": {
          "w": 5.7,
          "d": 5.7,
          "h": 11.5
        },
        "dims_m": {
          "w": 1.0,
          "d": 1.0,
          "h": 6.0
        },
        "note": "Verticale schacht, niet doorgegankelijk — mogelijk lucht/water.",
        "ratio": "1:1 (vierkant doorsnede)",
        "purpose": "lucht of water of constructie"
      },
      {
        "id": "ascending_passage",
        "name_nl": "Opstijgende Gang",
        "zStartRC": -7.6,
        "zEndRC": 91.7,
        "material": "mokattam_kalksteen",
        "dims_RC": {
          "w": 5.7,
          "h": 24.0,
          "d": 5.7
        },
        "dims_m": {
          "w": 1.0,
          "h": 12.6,
          "d": 1.0
        },
        "note": "26° omhoog door core. Naar Grand Gallery.",
        "ratio": "26° = halve piramide hoek",
        "angle_deg": 26,
        "squeezers": "graniet blokken (squeezers) in gang"
      },
      {
        "id": "squeezers",
        "name_nl": "Squeeze Steenen",
        "zStartRC": 40.0,
        "zEndRC": 80.0,
        "material": "aswan_graniet",
        "dims_RC": {
          "L": 15,
          "W": 5.7,
          "H": 5.7
        },
        "dims_m": {
          "L": 7.5,
          "W": 1.0,
          "H": 1.0
        },
        "note": "Twee enorme graniet blokken in de opstijgende gang. 'Squeeze' de gang in. Mogelijk oorspronkelijk als sluiting/afsluiting, later doorgebroken.",
        "count": 2,
        "weight_ton_each": 50,
        "ratio": "15:5.7:5.7 ≈ 2.6:1:1",
        "role": "afsluiting + structuurversterking + akoestische resonantie"
      },
      {
        "id": "queens_chamber",
        "name_nl": "Queen's Chamber",
        "zRC": 82.1,
        "material": "mokattam_kalksteen",
        "dims_RC": {
          "L": 21,
          "W": 10,
          "H": 12
        },
        "dims_m": {
          "L": 5.7,
          "W": 5.2,
          "H": 6.2
        },
        "layers": {
          "floor": {
            "count": 4,
            "layer_RC": 1,
            "note": "4 kalksteen vloerlagen"
          },
          "sides": {
            "count": 8,
            "layer_RC": 1.5,
            "note": "8 muren (4 noord + 4 zuid)"
          },
          "ends": {
            "count": 6,
            "layer_RC": 1.5,
            "note": "6 oost/west eindblokken"
          },
          "ceiling": {
            "count": 2,
            "layer_RC": 1,
            "note": "2 plafond balken (Aswan graniet!)"
          }
        },
        "note": "Kalksteen kamer met 2 graniet plafond balken + oost niche.",
        "ratio": "21:10:12 ≈ 2:1:1 (lengte:breedte:hoogte)",
        "volume_RC3": 2520,
        "volume_m3": 185,
        "niche": {
          "present": true,
          "side": "oost",
          "dims_m": {
            "w": 1.3,
            "h": 1.3,
            "d": 0.6
          }
        }
      },
      {
        "id": "queens_shafts",
        "name_nl": "Queen's Schachten",
        "zStartRC": 85.0,
        "material": "mokattam_kalksteen",
        "dims_RC": {
          "w": 1.5,
          "d": 1.5,
          "h": 23.0
        },
        "dims_m": {
          "w": 0.1,
          "d": 0.1,
          "h": 12.0
        },
        "note": "2 schachten (noord + zuid), zeer smal. Ontdekt in 1993 (Roberto Schulz).",
        "count": 2,
        "ratio": "1:1 (vierkant doorsnede)",
        "discovery": 1993,
        "robot_name": "DJi"
      },
      {
        "id": "grand_gallery",
        "name_nl": "Grand Gallery",
        "zStartRC": 85.9,
        "zEndRC": 107.0,
        "material": "tura_kalksteen",
        "dims_RC": {
          "L": 90,
          "W": 12,
          "H": 16
        },
        "dims_m": {
          "L": 46.7,
          "W": 2.1,
          "H": 8.6
        },
        "layers": {
          "floor": {
            "count": 3,
            "layer_RC": 1,
            "note": "3 Tura vloerlagen, centrale goot"
          },
          "walls": {
            "count": 14,
            "layer_RC": 1.2,
            "note": "14 lagen per kant, trapnotches + chevrons"
          },
          "chevrons": {
            "count": 18,
            "layer_RC": 0.8,
            "note": "18 paren V-vormig, versterken + akoestisch"
          },
          "corbelling": {
            "count": 7,
            "layer_RC": 0.5,
            "note": "7 stappen per kant, plafond sluit"
          }
        },
        "note": "Corbelled plafond. Chevron muren. 14 gallery galleries per kant. Puur Tura kalksteen — geen graniet.",
        "ratio": "90:12:16 ≈ 15:2:2.67 (extreme lengte)",
        "volume_RC3": 17280,
        "chevrons": {
          "pairs": 18,
          "per_side": 7
        },
        "gallery_galleries": {
          "per_side": 14,
          "total": 28
        },
        "pierced_notches": {
          "per_side": 6,
          "total": 12
        },
        "corbelling_steps": 7,
        "central_gutter": true
      },
      {
        "id": "kings_chamber",
        "name_nl": "King's Chamber",
        "zRC": 110.8,
        "material": "aswan_graniet",
        "dims_RC": {
          "L": 21,
          "W": 10,
          "H": 12
        },
        "dims_m": {
          "L": 10.4,
          "W": 5.2,
          "H": 5.8
        },
        "layers": {
          "floor": {
            "count": 6,
            "layer_RC": 1,
            "note": "6 graniet vloerplaten, 1 RC hoog"
          },
          "sides": {
            "count": 12,
            "layer_RC": 1.5,
            "note": "12 muren (6 oost + 6 west), 1.5 RC hoog"
          },
          "north": {
            "count": 5,
            "layer_RC": 1.5,
            "note": "5 noordwand blokken"
          },
          "ceiling": {
            "count": 1,
            "layer_RC": 1.5,
            "note": "1 plafond balk"
          }
        },
        "note": "23 graniet blokken totaal. Geen mortel — perfecte pasvorm.",
        "ratio": "21:10:12 = Queen's (dezelfde verhouding)",
        "volume_RC3": 2520,
        "volume_m3": 125,
        "blocks": {
          "total": 23,
          "floor": 6,
          "east_wall": 6,
          "west_wall": 6,
          "north_wall": 5,
          "south_wall": 0,
          "ceiling": "onduidelijk"
        },
        "coffin": {
          "present": true,
          "material": "aswan_graniet",
          "dims_m": {
            "L": 2.2,
            "W": 1.0,
            "H": 1.1
          }
        },
        "cracks": "graniet balken verticaal gespleten"
      },
      {
        "id": "kings_shafts",
        "name_nl": "King's Schachten",
        "zStartRC": 110.8,
        "material": "graniet platen (binnen) + kalksteen (buiten)",
        "dims_RC": {
          "w": 1.7,
          "d": 1.7,
          "h": 38.0
        },
        "dims_m": {
          "w": 0.1,
          "d": 0.1,
          "h": 20.0
        },
        "note": "4 schachten (N, S, 2x Oost). Noord → Orion, Zuid → Orion, Oost → Sirius.",
        "count": 4,
        "ratio": "1:1 (vierkant doorsnede)",
        "targets": {
          "north": "Orion's Belt",
          "south": "Orion's Belt",
          "east1": "Sirius",
          "east2": "onduidelijk"
        }
      },
      {
        "id": "relieving_1",
        "name_nl": "Relieving 1 (Graniet Balken)",
        "zRC": 116.0,
        "material": "aswan_graniet",
        "dims_RC": {
          "L": 21,
          "W": 10,
          "H": 1.0
        },
        "dims_m": {
          "L": 10.4,
          "W": 5.2,
          "H": 0.5
        },
        "note": "Eerste balk, 15 ton. Eerste luchtspouw.",
        "weight_ton": 15,
        "air_space": true
      },
      {
        "id": "relieving_2",
        "name_nl": "Relieving 2",
        "zRC": 119.6,
        "material": "aswan_graniet",
        "dims_RC": {
          "L": 21,
          "W": 10,
          "H": 1.0
        },
        "dims_m": {
          "L": 10.4,
          "W": 5.2,
          "H": 0.5
        },
        "note": "Tweede balk, 15 ton. Tweede luchtspouw.",
        "weight_ton": 15,
        "air_space": true
      },
      {
        "id": "relieving_3",
        "name_nl": "Relieving 3",
        "zRC": 123.2,
        "material": "aswan_graniet",
        "dims_RC": {
          "L": 21,
          "W": 10,
          "H": 1.0
        },
        "dims_m": {
          "L": 10.4,
          "W": 5.2,
          "H": 0.5
        },
        "note": "Derde balk, 15 ton. Derde luchtspouw.",
        "weight_ton": 15,
        "air_space": true
      },
      {
        "id": "relieving_4",
        "name_nl": "Relieving 4",
        "zRC": 126.8,
        "material": "aswan_graniet",
        "dims_RC": {
          "L": 21,
          "W": 10,
          "H": 1.0
        },
        "dims_m": {
          "L": 10.4,
          "W": 5.2,
          "H": 0.5
        },
        "note": "Vierde balk, 50 ton (zwaarste). Vierde luchtspouw.",
        "weight_ton": 50,
        "air_space": true
      },
      {
        "id": "relieving_5",
        "name_nl": "Relieving 5 (Punt)",
        "zRC": 129.9,
        "material": "tura_kalksteen",
        "dims_RC": {
          "L": 21,
          "W": 10,
          "H": 1.0
        },
        "dims_m": {
          "L": 10.4,
          "W": 5.2,
          "H": 0.5
        },
        "note": "Vijfde balk, 15 ton. Punt — laatste luchtspouw, dan steile opbouw naar apex.",
        "weight_ton": 15,
        "air_space": true,
        "top": true
      },
      {
        "id": "core_blocks",
        "name_nl": "Core Blokken (massa)",
        "material": "mokattam_kalksteen",
        "dims_RC_avg": {
          "w": 12,
          "d": 10,
          "h": 6
        },
        "dims_m_avg": {
          "w": 1.8,
          "d": 1.5,
          "h": 1.0
        },
        "weight_ton_avg": 2.5,
        "note": "Lokale Giza kalksteen. Meeste blokken.",
        "count_est": 2000000,
        "ratio": "6:5:3 (ongeveer)"
      },
      {
        "id": "outer_casing",
        "name_nl": "Buitenbekleding",
        "material": "tura_kalksteen",
        "dims_RC_avg": {
          "w": 14,
          "d": 14,
          "h": 7
        },
        "dims_m_avg": {
          "w": 2.0,
          "d": 2.0,
          "h": 1.0
        },
        "weight_ton_avg": 15,
        "note": "Witte gepolijste Tura kalksteen. Grotendeels verwijderd.",
        "count_est": 200000,
        "ratio": "2:2:1",
        "polished": true,
        "remaining": "basislaag + top"
      },
      {
        "id": "big_void",
        "name_nl": "Big Void (ScanPyramids)",
        "zRC": 107.0,
        "material": "lucht",
        "dims_RC": {
          "L": 52,
          "W": 10,
          "H": 10
        },
        "dims_m": {
          "L": 27.0,
          "W": 5.2,
          "H": 5.2
        },
        "note": "Ontdekt 2017. Boven Grand Gallery. μ-depton detectie.",
        "ratio": "L:W:H = 27:5.2:5.2 ≈ 5:1:1",
        "discovery": 2017,
        "discovery_method": "μ-depton",
        "volume_m3": 740
      },
      {
        "id": "north_face_void",
        "name_nl": "Noordgevel Void",
        "zRC": 51.6,
        "material": "lucht",
        "dims_RC": {
          "L": 18,
          "W": 5,
          "H": 5
        },
        "dims_m": {
          "L": 9.5,
          "W": 2.6,
          "H": 2.6
        },
        "note": "Ontdekt 2023. Driehoekige holte in noordgevel.",
        "discovery": 2023,
        "discovery_method": "μ-depton",
        "shape": "driehoekig"
      },
      {
        "id": "piemion",
        "name_nl": "Piemion (Kapsteen)",
        "zRC": 144.0,
        "material": "aswan_graniet",
        "cladding": "elektro",
        "dims_RC": {
          "L": 5,
          "W": 5,
          "H": 6
        },
        "dims_m": {
          "L": 1.0,
          "W": 1.0,
          "H": 1.5
        },
        "note": "Originele kapsteen van Cheops. Aswan graniet kern met elektro (goud-koper) bekleding. Zonnespiegel + elektromagnetische resonantie. Huidige top is afgesleten.",
        "weight_ton": 2.5,
        "clad_weight_kg_est": 50,
        "ratio": "1:1:1.2 (approximatief)",
        "status": "origineel verloren, top afgesleten",
        "role": "zonnespiegel, resonantietop, kosmische antenne"
      }
    ]
  },
  "material_summary": {
    "aswan_graniet": {
      "used_in": [
        "kings_chamber",
        "entrance_exterior",
        "relieving_1",
        "relieving_2",
        "relieving_3",
        "relieving_4",
        "kings_coffin"
      ],
      "total_weight_ton_est": 2000,
      "origin_km": 800,
      "transport": "Nijl (winter, vloed)",
      "cost": "hoogste"
    },
    "tura_kalksteen": {
      "used_in": [
        "outer_casing",
        "grand_gallery",
        "queens_chamber_walls",
        "relieving_5"
      ],
      "total_weight_ton_est": 300000,
      "origin_km": 10,
      "transport": "Nijl (noordelijk)",
      "cost": "middel"
    },
    "mokattam_kalksteen": {
      "used_in": [
        "core_blocks",
        "descending_passage",
        "ascending_passage",
        "queens_chamber",
        "shafts"
      ],
      "total_weight_ton_est": 5000000,
      "origin_km": 0,
      "transport": "ter plaatse",
      "cost": "laagst"
    },
    "basalt": {
      "used_in": [
        "subterranean_floor"
      ],
      "total_weight_ton_est": 500,
      "origin_km": 600,
      "transport": "Nijl",
      "cost": "hoog"
    }
  },
  "game_import": {
    "material_ids": [
      "aswan_graniet",
      "tura_kalksteen",
      "mokattam_kalksteen",
      "basalt",
      "albast"
    ],
    "per_material": {
      "color": "hex voor rendering",
      "density": "voor gewicht/fysica",
      "freq": "voor audio-feedback",
      "sanskrit_seed": "voor mantra/audio",
      "thermo_role": "voor game-mechanics"
    }
  }
}