{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-13T01:10:31Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 3, "engine": "claude", "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T10:00:00Z", "ingestedAt": "2026-10-06T07:05:06+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "revisions": [ { "at": "2026-10-06T22:57:03+00:00", "engine": "codex", "fields": [ "definition" ], "answering_review": "9ac8f48c3e8e7bb35ba65d26024830b1977376838a3b987175fab1c6d09d0031" } ], "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:32+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q713", "registryId": "vr.tr.scandium", "name": "scandium", "version": "0.2.0-wave.3", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q713/", "model": { "registry_id": "vr.tr.scandium", "name": "scandium", "purpose": "Let an agent identify scandium and its properties, relay occurrence, production, uses and supply issues from reference sources, and distinguish it from other rare earths and from yttrium.", "definition": "A chemical element with symbol Sc and atomic number 21, a soft silvery transition metal classified with the rare earth elements, occurring in trace amounts in many minerals and recovered mainly as a by-product of uranium, titanium and aluminium processing, used in small amounts in aluminium-scandium alloys for aerospace and sports equipment, in solid oxide fuel cells and in high-intensity lamps; scandium has one stable isotope, scandium-45, and multiple radioactive isotopes, and its supply is small and expensive.", "what_it_is_for": "Alloys, fuel cells and lighting.", "affordances": [ "relay properties and isotopes", "explain occurrence and production", "relay uses and supply", "distinguish from related elements" ], "distinguishing_features": [ "Light rare earth", "Single stable isotope", "By-product production", "Small costly supply" ], "appearance": "A silvery white metal that develops a yellowish or pinkish cast in air.", "visual_identification": [ "Element 21, symbol Sc", "Light rare earth metal of aluminium alloys", "Yttrium is the heavier group member; titanium is the neighbouring element" ], "physical_properties": [ { "quantity": "atomic number", "typical_range": "21", "unit": "Z", "note": "" }, { "quantity": "standard atomic weight", "typical_range": "44.956", "unit": "u", "note": "" }, { "quantity": "density", "typical_range": "2.985", "unit": "g/cm3", "note": "" }, { "quantity": "melting point", "typical_range": "1541", "unit": "degrees C", "note": "" } ], "families_and_kinds": [ "scandium metal", "scandium compounds such as the oxide and fluoride", "scandium-45 as the stable isotope and radioactive isotopes such as scandium-46", "aluminium-scandium alloys", "scandium in fuel cells and lamps" ], "related_models": [ { "relation": "is a kind of", "target": "rare earth element", "why": "in registry terms" }, { "relation": "is a kind of", "target": "light metal", "why": "in registry terms" }, { "relation": "is used in", "target": "aluminium-scandium alloy", "why": "the main metal use" }, { "relation": "is adjacent to", "target": "titanium", "why": "element 22" } ], "identifiers": [ { "scheme": "symbol", "value_or_pattern": "Sc", "note": "" }, { "scheme": "CAS", "value_or_pattern": "7440-20-2", "note": "" } ], "standards_and_regulation": [ "Critical raw material listings", "Chemical safety data sheets", "Aerospace material specifications for alloys" ], "failure_modes_and_hazards": [ "Supply scarcity and price", "Confusing with yttrium and lanthanides", "Radioactive isotope handling in research" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "may": [ "Explain scandium's properties and its use in alloys and lighting.", "Report production and price figures with their source and year." ], "must_not": [ "Misstate the origin of scandium recovered as a by-product to hide its supply chain.", "Advise handling scandium powders without proper protection and ventilation.", "Present speculative supply forecasts for a thinly traded metal as firm.", "Dispose of processing residues from uranium or titanium streams against waste rules." ], "requires_human": [ "Approving procurement from a source flagged for radiological or environmental concern." ] }, "ethics": { "considerations": [ "Recovery streams can carry radioactive residues that affect workers and neighbours.", "Thin markets make price and supply claims easy to manipulate." ], "affected_parties": [ "Processing workers", "Communities near processing plants", "Buyers relying on supply forecasts" ] }, "owners": { "steward": "The holder of each stock; mining and processing rights are granted by the state.", "master_systems": [] } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q713: scandium", "url": "https://www.wikidata.org/wiki/Q713", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Scandium", "url": "https://en.wikipedia.org/wiki/Scandium", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "identify", "name": "Identify", "description": "What scandium is.", "rationale": "Identity.", "layers": [ { "id": "properties", "name": "Properties", "description": "Properties.", "findings": [ { "id": "properties-finding", "name": "Properties", "description": "Properties.", "questions": [ { "text": "What are the physical and chemical properties of scandium?", "kind": "definition" }, { "text": "Is the question about scandium or a neighbouring element?", "kind": "boundary" } ] } ] }, { "id": "isotopes", "name": "Isotopes", "description": "Isotopes.", "findings": [ { "id": "isotopes-finding", "name": "Isotopes", "description": "Isotopes.", "questions": [ { "text": "Which isotopes exist, and how are radioactive ones used?", "kind": "definition" }, { "text": "Which entry fits the specific isotope?", "kind": "action" } ] } ] } ] }, { "id": "source", "name": "Source", "description": "Occurrence and production.", "rationale": "Supply.", "layers": [ { "id": "occurrence", "name": "Occurrence", "description": "Occurrence.", "findings": [ { "id": "occurrence-finding", "name": "Occurrence", "description": "Occurrence.", "questions": [ { "text": "Where does scandium occur, and how is it recovered as a by-product?", "kind": "provenance" }, { "text": "Which entry fits thortveitite?", "kind": "action" } ] } ] }, { "id": "supply", "name": "Supply", "description": "Supply.", "findings": [ { "id": "supply-finding", "name": "Supply", "description": "Supply.", "questions": [ { "text": "Who produces scandium, and why is supply small and costly, with sources?", "kind": "measurement" }, { "text": "Which sources are cited?", "kind": "provenance" } ] } ] } ] }, { "id": "use", "name": "Use", "description": "Uses.", "rationale": "Application.", "layers": [ { "id": "alloys", "name": "Alloys", "description": "Alloys.", "findings": [ { "id": "alloys-finding", "name": "Alloys", "description": "Alloys.", "questions": [ { "text": "How does scandium strengthen aluminium alloys, and where are they used?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] }, { "id": "other", "name": "Other", "description": "Fuel cells and lamps.", "findings": [ { "id": "other-finding", "name": "Other", "description": "Other.", "questions": [ { "text": "How is scandium used in solid oxide fuel cells and metal halide lamps?", "kind": "provenance" }, { "text": "Which entry fits solid oxide fuel cell?", "kind": "action" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "History and outlook.", "rationale": "Context.", "layers": [ { "id": "discovery", "name": "Discovery", "description": "Discovery.", "findings": [ { "id": "discovery-finding", "name": "Discovery", "description": "Discovery.", "questions": [ { "text": "How was scandium predicted by Mendeleev and discovered by Nilson in 1879?", "kind": "provenance" }, { "text": "Which entry fits the history of the periodic table?", "kind": "action" } ] } ] }, { "id": "outlook", "name": "Outlook", "description": "Supply outlook.", "findings": [ { "id": "outlook-finding", "name": "Outlook", "description": "Outlook.", "questions": [ { "text": "What new sources and projects are reported for scandium supply?", "kind": "provenance" }, { "text": "Is the presentation attributed?", "kind": "boundary" } ] } ] } ] } ] }, "openQuestions": [ "Should aluminium-scandium alloy be a separate entry?", "How should supply data be linked?", "The registry entry has merged aliases naming short-lived isotopes; should they be split off?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }