{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-10-22T11:03:41Z",
    "providers": [
      "Claude"
    ],
    "breadth": "researched by Claude against the sources listed below",
    "pass": 2,
    "wave": 5,
    "engine": "claude",
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-22T11:35:02+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "3 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q43533",
    "registryId": "vr.tr.crystal",
    "name": "crystal",
    "version": "0.2.0-wave.5",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.OBJ"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q43533/",
  "model": {
    "registry_id": "vr.tr.crystal",
    "name": "crystal",
    "purpose": "Let an agent describe crystals by structure, symmetry and properties, and point to crystallographic databases.",
    "definition": "A solid whose atoms, ions or molecules are arranged in a highly ordered, repeating pattern (a crystal lattice) extending in three dimensions; single crystals have one continuous lattice, while most solids are polycrystalline; since 1992 the IUCr definition also covers aperiodic crystals with an essentially discrete diffraction pattern.",
    "what_it_is_for": "A fundamental form of solid matter.",
    "affordances": [
      "explain crystal systems and lattices",
      "find structures in crystallographic databases",
      "explain crystal growth",
      "distinguish crystals from amorphous solids"
    ],
    "distinguishing_features": [
      "Seven crystal systems, 14 Bravais lattices and 230 space groups describe periodic crystals.",
      "X-ray diffraction reveals crystal structure.",
      "Glass is amorphous, not crystalline; lead 'crystal' glass is a misnomer."
    ],
    "appearance": "Often flat faces and regular shapes (habit), though many crystals are microscopic grains.",
    "visual_identification": [
      "Flat faces, sharp edges and regular angles in well-formed specimens"
    ],
    "physical_properties": [],
    "families_and_kinds": [
      "single crystal",
      "ionic crystal",
      "covalent network crystal",
      "molecular crystal",
      "metallic crystal",
      "quasicrystal (aperiodic)"
    ],
    "related_models": [
      {
        "relation": "is studied by",
        "target": "crystallography",
        "why": "science"
      },
      {
        "relation": "is described by",
        "target": "space group",
        "why": "symmetry"
      },
      {
        "relation": "is contrasted with",
        "target": "amorphous solid",
        "why": "disorder"
      },
      {
        "relation": "is related to",
        "target": "polycrystal and liquid crystal",
        "why": "aggregate of grains; a different state of matter"
      }
    ],
    "identifiers": [
      {
        "scheme": "CSD refcode",
        "value_or_pattern": "6 letters, optionally followed by 2 digits",
        "note": "Cambridge Structural Database structure record"
      },
      {
        "scheme": "COD ID",
        "value_or_pattern": "7 digits",
        "note": "Crystallography Open Database structure record"
      },
      {
        "scheme": "ICSD collection code",
        "value_or_pattern": "numeric",
        "note": "inorganic structure record; not a physical specimen"
      }
    ],
    "standards_and_regulation": [
      "IUCr definitions and International Tables for Crystallography",
      "CIF (Crystallographic Information File) format"
    ],
    "failure_modes_and_hazards": [
      "Material-specific hazards and degradation (toxicity, cleavage, dissolution, phase change)",
      "Pseudoscientific health claims about crystals"
    ],
    "agent_conduct": {
      "may": [
        "explain structure and point to databases"
      ],
      "must_not": [
        "endorse healing claims"
      ],
      "requires_human": []
    },
    "ethics": {
      "considerations": [
        "scientific accuracy"
      ],
      "affected_parties": [
        "learners",
        "consumers"
      ]
    },
    "owners": {
      "steward": "nobody; a state of matter",
      "master_systems": [
        "Cambridge Structural Database",
        "Crystallography Open Database",
        "ICSD"
      ]
    },
    "facets_not_applicable": {
      "properties": "Properties belong to each crystalline substance."
    },
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": []
  },
  "sources": [
    {
      "id": "SRC-001",
      "title": "Q43533",
      "publisher": "Wikidata",
      "url": "https://www.wikidata.org/wiki/Q43533",
      "what_it_supports": "identity of the registry item, labels and sitelinks",
      "url_status": "live"
    },
    {
      "id": "SRC-002",
      "title": "Crystal",
      "publisher": "Wikipedia",
      "url": "https://en.wikipedia.org/wiki/Crystal",
      "what_it_supports": "general description of the subject",
      "url_status": "live"
    },
    {
      "id": "SRC-003",
      "title": "Crystal",
      "publisher": "International Union of Crystallography",
      "url": "https://dictionary.iucr.org/Crystal",
      "what_it_supports": "Long-range order, periodic and aperiodic crystals, diffraction definition and the 1992 reference.",
      "url_status": "blocked"
    },
    {
      "id": "SRC-004",
      "title": "How to read (and understand) Volume A of International Tables for Crystallography",
      "publisher": "International Union of Crystallography",
      "url": "https://journals.iucr.org/j/issues/2010/05/02/kk5061/index.html",
      "what_it_supports": "Crystal systems, Bravais lattices, space groups and unit-cell geometry.",
      "url_status": "blocked"
    },
    {
      "id": "SRC-005",
      "title": "Can I search on CSD refcodes within ConQuest?",
      "publisher": "Cambridge Crystallographic Data Centre",
      "url": "https://support.ccdc.cam.ac.uk/support/solutions/articles/103000306101-can-i-search-on-csd-refcodes-within-conquest-",
      "what_it_supports": "Six-letter refcodes and optional two-digit suffixes.",
      "url_status": "live"
    },
    {
      "id": "SRC-006",
      "title": "Crystallography Open Database: an open-access collection of crystal structures and platform for world-wide collaboration",
      "publisher": "Oxford University Press, Nucleic Acids Research",
      "url": "https://academic.oup.com/nar/article/40/D1/D420/2903497",
      "what_it_supports": "Seven-digit COD numbers identify particular structure determinations.",
      "url_status": "blocked"
    },
    {
      "id": "SRC-007",
      "title": "ICSD Scientific Manual",
      "publisher": "FIZ Karlsruhe",
      "url": "https://www.fiz-karlsruhe.de/sites/default/files/ICSD/documents/brochures/scientific-manual-2021-en.pdf",
      "what_it_supports": "Inorganic structure records, numeric collection codes and recorded crystallographic properties.",
      "url_status": "unverified"
    },
    {
      "id": "SRC-008",
      "title": "Crystallographic Information Framework",
      "publisher": "International Union of Crystallography",
      "url": "https://www.iucr.org/what-we-do/digital-standards/cif",
      "what_it_supports": "CIF terminology, IUCr stewardship and representation of crystallographic measurements.",
      "url_status": "blocked"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "structure",
        "name": "Structure",
        "description": "Lattice.",
        "rationale": "Structure defines a crystal.",
        "layers": [
          {
            "id": "symmetry",
            "name": "Symmetry",
            "description": "System and space group.",
            "findings": [
              {
                "id": "space-group",
                "name": "Space group",
                "description": "Symbol and number.",
                "questions": [
                  {
                    "text": "Which space group?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which crystal system?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "unit-cell",
            "name": "Unit cell",
            "description": "Parameters.",
            "findings": [
              {
                "id": "unit-cell",
                "name": "Unit cell",
                "description": "Cell lengths and angles with units and uncertainties, measurement temperature and pressure.",
                "questions": [
                  {
                    "text": "What are the cell parameters?",
                    "kind": "measurement"
                  },
                  {
                    "text": "From which structure determination?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "composition",
        "name": "Composition",
        "description": "What it is made of.",
        "rationale": "Bonding varies.",
        "layers": [
          {
            "id": "substance",
            "name": "Substance",
            "description": "Chemistry.",
            "findings": [
              {
                "id": "substance",
                "name": "Substance",
                "description": "Formula.",
                "questions": [
                  {
                    "text": "What substance?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which polymorph?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "bonding",
            "name": "Bonding",
            "description": "Type.",
            "findings": [
              {
                "id": "bonding",
                "name": "Bonding",
                "description": "Type.",
                "questions": [
                  {
                    "text": "Ionic, covalent, molecular or metallic?",
                    "kind": "boundary"
                  },
                  {
                    "text": "Per which source?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "form",
        "name": "Form",
        "description": "Habit and size.",
        "rationale": "Form varies.",
        "layers": [
          {
            "id": "habit",
            "name": "Habit",
            "description": "Shape.",
            "findings": [
              {
                "id": "habit",
                "name": "Habit",
                "description": "Description.",
                "questions": [
                  {
                    "text": "What habit?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which faces?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "defects",
            "name": "Defects",
            "description": "Imperfections.",
            "findings": [
              {
                "id": "defect",
                "name": "Defect",
                "description": "Type.",
                "questions": [
                  {
                    "text": "Which defects?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Measured how?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "determination",
        "name": "Determination",
        "description": "Methods.",
        "rationale": "Diffraction reveals structure.",
        "layers": [
          {
            "id": "method",
            "name": "Method",
            "description": "Diffraction.",
            "findings": [
              {
                "id": "method",
                "name": "Method",
                "description": "Technique.",
                "questions": [
                  {
                    "text": "Which method (X-ray, neutron, electron)?",
                    "kind": "provenance"
                  },
                  {
                    "text": "At what temperature?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          },
          {
            "id": "record",
            "name": "Record",
            "description": "Database entry.",
            "findings": [
              {
                "id": "database-entry",
                "name": "Database entry",
                "description": "ID.",
                "questions": [
                  {
                    "text": "Which database entry?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which CIF?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "The registry merges a gemstone colour sense and specific crystal forms; they need review."
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}