{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-13T00:18:36Z", "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": "2026-10-06T07:01:01+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-06T19:52:03+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q938", "registryId": "vr.tr.strontium", "name": "strontium", "version": "0.2.0-wave.3", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q938/", "model": { "registry_id": "vr.tr.strontium", "name": "strontium", "purpose": "Let an agent identify strontium and its properties, relay isotopes, occurrence, uses and health aspects from reference sources, and distinguish it from neighbouring alkaline earth metals.", "definition": "A chemical element with symbol Sr and atomic number 38, a soft silvery alkaline earth metal that reacts with air and water, occurring in the minerals celestine and strontianite; strontium compounds give a red colour to fireworks and flares, were used in cathode ray tube glass, and are used in ceramics and magnets, the radioactive isotope strontium-90 is a fission product of concern in nuclear fallout, and strontium ranelate has been used in osteoporosis treatment; the element has four stable isotopes and many radioactive ones from strontium-73 upward.", "what_it_is_for": "Pyrotechnics, ceramics, magnets and specialised uses.", "affordances": [ "relay properties and isotopes", "explain occurrence and uses", "relay health and environmental aspects", "distinguish from calcium and barium" ], "distinguishing_features": [ "Red flame colour", "Strontium-90 fallout concern", "Chemically similar to calcium", "Celestine and strontianite ores" ], "appearance": "A silvery metal that turns yellowish in air.", "visual_identification": [ "Element 38, symbol Sr", "Alkaline earth metal of red fireworks", "Calcium and barium are the neighbouring alkaline earth metals" ], "physical_properties": [ { "quantity": "atomic number", "typical_range": "38", "unit": "Z", "note": "" }, { "quantity": "standard atomic weight", "typical_range": "87.62", "unit": "u", "note": "" }, { "quantity": "melting point", "typical_range": "777", "unit": "degrees C", "note": "" }, { "quantity": "strontium-90 half-life", "typical_range": "28.8", "unit": "years", "note": "" } ], "families_and_kinds": [ "strontium metal", "strontium compounds such as carbonate, nitrate and titanate", "stable isotopes 84, 86, 87 and 88", "radioactive isotopes including strontium-90 and light isotopes from strontium-73 to strontium-78", "strontium in medicine and dating" ], "related_models": [ { "relation": "is a kind of", "target": "alkaline earth metal", "why": "in registry terms" }, { "relation": "is a kind of", "target": "light metal", "why": "in registry terms" }, { "relation": "is adjacent to", "target": "calcium", "why": "element 20 in the same group" }, { "relation": "has isotope", "target": "strontium-90", "why": "a fission product" } ], "identifiers": [ { "scheme": "symbol", "value_or_pattern": "Sr", "note": "" }, { "scheme": "CAS", "value_or_pattern": "7440-24-6", "note": "" } ], "standards_and_regulation": [ "Radiation protection limits for strontium-90", "Chemical safety data sheets", "Pyrotechnics regulations" ], "failure_modes_and_hazards": [ "Strontium-90 uptake in bone", "Reactivity of the metal with water", "Confusing stable and radioactive strontium" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "may": [ "Report strontium's chemistry, minerals and uses from reliable references.", "Distinguish stable strontium from its radioactive isotopes when describing a sample." ], "must_not": [ "Confuse stable strontium with radioactive strontium in any report or label.", "Recommend strontium supplements as a treatment for bone disease.", "Handle or move material that may be radioactive without the licensed controls.", "Dispose of strontium compounds into drains or soil." ], "requires_human": [ "Any handling of radioactive isotopes, which requires a licensed operator.", "Any medical use." ] }, "ethics": { "considerations": [ "Radioactive strontium from fallout and accidents concentrates in bone and harms people for decades.", "Supplements marketed from the element's name have caused real harm." ], "affected_parties": [ "People near contaminated sites", "Patients taking supplements", "Laboratory workers" ] }, "owners": { "steward": "Nobody owns the element; the licensed holder answers for any radioactive material.", "master_systems": [ "Radioactive material licensing registers" ] } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q938: strontium", "url": "https://www.wikidata.org/wiki/Q938", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Strontium", "url": "https://en.wikipedia.org/wiki/Strontium", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "identify", "name": "Identify", "description": "What strontium 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 strontium?", "kind": "definition" }, { "text": "Is the question about strontium 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 why does strontium-90 matter?", "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 strontium occur, and how is it produced?", "kind": "provenance" }, { "text": "Which entry fits celestine?", "kind": "action" } ] } ] }, { "id": "supply", "name": "Supply", "description": "Supply.", "findings": [ { "id": "supply-finding", "name": "Supply", "description": "Supply.", "questions": [ { "text": "Who produces strontium, and how has demand changed, with sources?", "kind": "measurement" }, { "text": "Which sources are cited?", "kind": "provenance" } ] } ] } ] }, { "id": "use", "name": "Use", "description": "Uses and health.", "rationale": "Application.", "layers": [ { "id": "uses", "name": "Uses", "description": "Uses.", "findings": [ { "id": "uses-finding", "name": "Uses", "description": "Uses.", "questions": [ { "text": "How is strontium used in pyrotechnics, ceramics, magnets and other products?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] }, { "id": "health", "name": "Health", "description": "Health and environment.", "findings": [ { "id": "health-finding", "name": "Health", "description": "Health.", "questions": [ { "text": "What are the health effects of stable and radioactive strontium, and what about strontium in medicine, in general terms?", "kind": "provenance" }, { "text": "Is the user asking about personal exposure or treatment, which needs a professional?", "kind": "boundary" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "History and science.", "rationale": "Context.", "layers": [ { "id": "discovery", "name": "Discovery", "description": "Discovery.", "findings": [ { "id": "discovery-finding", "name": "Discovery", "description": "Discovery.", "questions": [ { "text": "How was strontium discovered near Strontian in Scotland and isolated by Davy?", "kind": "provenance" }, { "text": "Which entry fits the history of chemistry?", "kind": "action" } ] } ] }, { "id": "science", "name": "Science", "description": "Isotope science.", "findings": [ { "id": "science-finding", "name": "Science", "description": "Science.", "questions": [ { "text": "How are strontium isotope ratios used in geology, archaeology and food provenance?", "kind": "provenance" }, { "text": "Which entry fits isotope geochemistry?", "kind": "action" } ] } ] } ] } ] }, "openQuestions": [ "Should strontium-90 be a separate primary entry?", "How should reference 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 } }