{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.crystal","code":"thing-q43533","url":"https://ver.cy/models/thing/q43533/","name":"crystal","alternateNames":["wax crystal","oikocryst","covalent crystal","aperiodic crystal","ferromagnetic crystal","purple gemstone","subhedral crystal","cheese crystals","single-layer materials","Titan:Sapphire","metamict","incommensurable crystal"],"kind":"thing","status":"published","version":"0.2.0-wave.5","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.OBJ"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"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.","purpose":"Let an agent describe crystals by structure, symmetry and properties, and point to crystallographic databases.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["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."],"structure":{"bundles":[{"id":"structure","name":"Structure","description":"Lattice.","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.","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.","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.","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"}]}]}]}]},"agentConduct":{"may":["explain structure and point to databases"],"mustNot":["endorse healing claims"],"requiresHuman":[]},"ethics":{"considerations":["scientific accuracy"],"affectedParties":["learners","consumers"]},"owners":{"steward":"nobody; a state of matter","roles":[],"masterSystems":["Cambridge Structural Database","Crystallography Open Database","ICSD"]},"relations":[{"target":"Q11438","type":"parent","note":"registry parent class"},{"target":"Q79529","type":"parent","note":"registry parent class"},{"target":"Q908049","type":"parent","note":"registry parent class"},{"target":"crystallography","type":"related","note":"science"},{"target":"space group","type":"related","note":"symmetry"},{"target":"amorphous solid","type":"related","note":"disorder"},{"target":"polycrystal and liquid crystal","type":"related","note":"aggregate of grains; a different state of matter"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.crystal","Wikidata: Q43533 (https://www.wikidata.org/wiki/Q43533)","CSD refcode: 6 letters, optionally followed by 2 digits Cambridge Structural Database structure record","COD ID: 7 digits Crystallography Open Database structure record","ICSD collection code: numeric inorganic structure record; not a physical specimen"]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"required","items":["Flat faces, sharp edges and regular angles in well-formed specimens","Often flat faces and regular shapes (habit), though many crystals are microscopic grains."]},"capabilities":{"applicability":"required","items":["explain crystal systems and lattices","find structures in crystallographic databases","explain crystal growth","distinguish crystals from amorphous solids"]},"hazards":{"applicability":"required","items":["Material-specific hazards and degradation (toxicity, cleavage, dissolution, phase change)","Pseudoscientific health claims about crystals"]},"interfaces":{"applicability":"required","items":["IUCr definitions and International Tables for Crystallography","CIF (Crystallographic Information File) format"]},"context":{"applicability":"required","items":["A fundamental form of solid matter.","single crystal","ionic crystal","covalent network crystal","molecular crystal","metallic crystal","quasicrystal (aperiodic)"]}},"sources":[{"title":"Q43533","url":"https://www.wikidata.org/wiki/Q43533","note":"identity of the registry item, labels and sitelinks"},{"title":"Crystal","url":"https://en.wikipedia.org/wiki/Crystal","note":"general description of the subject"},{"title":"Crystal","url":"https://dictionary.iucr.org/Crystal","note":"Long-range order, periodic and aperiodic crystals, diffraction definition and the 1992 reference."},{"title":"How to read (and understand) Volume A of International Tables for Crystallography","url":"https://journals.iucr.org/j/issues/2010/05/02/kk5061/index.html","note":"Crystal systems, Bravais lattices, space groups and unit-cell geometry."},{"title":"Can I search on CSD refcodes within ConQuest?","url":"https://support.ccdc.cam.ac.uk/support/solutions/articles/103000306101-can-i-search-on-csd-refcodes-within-conquest-","note":"Six-letter refcodes and optional two-digit suffixes."},{"title":"Crystallography Open Database: an open-access collection of crystal structures and platform for world-wide collaboration","url":"https://academic.oup.com/nar/article/40/D1/D420/2903497","note":"Seven-digit COD numbers identify particular structure determinations."},{"title":"ICSD Scientific Manual","url":"https://www.fiz-karlsruhe.de/sites/default/files/ICSD/documents/brochures/scientific-manual-2021-en.pdf","note":"Inorganic structure records, numeric collection codes and recorded crystallographic properties."},{"title":"Crystallographic Information Framework","url":"https://www.iucr.org/what-we-do/digital-standards/cif","note":"CIF terminology, IUCr stewardship and representation of crystallographic measurements."}],"openQuestions":["The registry merges a gemstone colour sense and specific crystal forms; they need review."],"resources":{"spec":"/models/things/publications/thing-q43533/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q43533/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-10-22T11:03:41Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-22T11:35:02+00:00: completeness 1.00; sense: Wikidata description; 3 live sources; review by codex: pass","interaction.properties":"Properties belong to each crystalline substance."},"score":1.0}}