{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T08:21:26Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 27.3, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094b3-b278-72f3-b461-42a45b03f2cd\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: calcium silicide\nSense to describe: (none recorded)\nDomain code: PHY.MAT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 043: 100", "usd": 0.0, "recall": true }, "codex": { "seconds": 87.6, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094b3-b26d-7a82-b187-097f9b9d5d1a\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: calcium silicide\nRegistry id: vr.tr.calcium-silicide\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entry:" } }, "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T12:00:00Z", "ingestedAt": "2026-10-06T08:51:39+00:00", "fields": [ "agent_conduct", "ethics", "failure_modes_and_hazards", "owners", "standards_and_regulation", "visual_identification" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:30+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q416381", "registryId": "vr.tr.calcium-silicide", "name": "calcium silicide", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q416381/", "model": { "registry_id": "vr.tr.calcium-silicide", "name": "calcium silicide", "purpose": "Enable an agent to identify calcium silicide, assess a specific material lot, and determine whether its composition, condition and documented handling requirements support an intended use.", "definition": "Calcium silicide is a calcium-silicon material, commonly referring to calcium disilicide (CaSi2), whose precise phase composition and impurity content must be specified to distinguish a defined compound from a commercial metallurgical product.", "scope_statement": "This model owns vr.tr.calcium-silicide as a calcium-silicon material identity, including stoichiometry, constituent phases, grade, physical condition and applicability of safety evidence; the registry's unspecified name must not automatically be narrowed to calcium disilicide.", "in_scope": [ "Resolution of the registered name to a documented calcium silicide composition", "Calcium-to-silicon ratio, phase identity, purity and technical-grade constituents", "Particle form, surface condition and changes during storage", "Measured physical properties with phase and test conditions", "Material-specific reactivity, hazard identity and use suitability" ], "out_of_scope": [ "Elemental calcium and silicon as independently supplied substances", "Calcium silicates and other oxygen-containing calcium-silicon compounds", "Manufacturing equipment and synthesis process designs", "Finished steel, alloy or formulated products containing calcium silicide", "Detailed operating procedures for metallurgical or chemical conversion processes" ], "distinguishing_features": [ "Resolve the formula explicitly: PubChem distinguishes CaSi, CaSi2 and Ca2Si records, so the bare name does not establish stoichiometry. [CaSi](https://pubchem.ncbi.nlm.nih.gov/compound/Calcium-silicide-_CaSi), [CaSi2](https://pubchem.ncbi.nlm.nih.gov/compound/Calcium-silicide-_CaSi2), [Ca2Si](https://pubchem.ncbi.nlm.nih.gov/compound/Dicalcium-silicide).", "Require evidence of a calcium silicide phase rather than accepting a physical mixture of calcium and silicon on elemental composition alone.", "Distinguish silicide from silicate using phase identification and oxygen-bearing constituent analysis; superficial oxidation does not by itself establish bulk silicate identity.", "Distinguish a nominal compound from a technical material: a supplier sells technical calcium silicide under CaSi2 and CAS 12013-56-8, but that designation alone does not establish a lot's phase purity. [Supplier product record](https://www.sigmaaldrich.com/JP/en/product/aldrich/21240).", "Treat powder, granules and consolidated material as forms requiring separate condition and suitability evidence, even when their nominal formula matches." ], "characteristics": [ { "name": "Resolved chemical identity", "kind": "category", "unit_or_values": "Explicit formula and phase assignment; unresolved when evidence is insufficient", "why_it_matters": "Prevents properties and identifiers from different calcium silicides being combined." }, { "name": "Regulatory and database identifiers", "kind": "relation", "unit_or_values": "CAS number, EC number and PubChem CID linked to the matching composition and source", "why_it_matters": "Connects the material to applicable records without treating similar names as equivalent." }, { "name": "Bulk calcium and silicon content", "kind": "measurement", "unit_or_values": "Mass % for each element and calculated atomic Ca:Si ratio", "why_it_matters": "Tests nominal composition and supports application-specific material balances." }, { "name": "Crystalline phase composition", "kind": "measurement", "unit_or_values": "Identified phases and mass % where quantitatively established", "why_it_matters": "Separates compound purity from elemental assay and detects multiphase material." }, { "name": "Grade and impurity profile", "kind": "category", "unit_or_values": "Supplier grade and specification, with impurities reported in mass % or mg/kg", "why_it_matters": "Determines whether a nominally matching material meets the intended use's constraints." }, { "name": "Particle form and size distribution", "kind": "measurement", "unit_or_values": "Form category; particle sizes in µm or mm; distribution method and basis", "why_it_matters": "Supports assessment of dust generation, feed behavior and exposed surface." }, { "name": "Surface and storage condition", "kind": "state", "unit_or_values": "As received, documented exposure, altered surface, suspected degradation or unassessed", "why_it_matters": "A lot's current condition may differ from the condition described by its original certificate." }, { "name": "Thermal behavior", "kind": "measurement", "unit_or_values": "Transition or decomposition temperature in °C, with pressure, atmosphere and event assignment", "why_it_matters": "Prevents an observed reaction or phase change from being misreported as a universal melting or boiling point." }, { "name": "Density", "kind": "measurement", "unit_or_values": "g/cm³ for material density; kg/m³ for bulk density; method and temperature", "why_it_matters": "Separates intrinsic phase properties from packing-dependent powder behavior." }, { "name": "Applicable hazard classification", "kind": "category", "unit_or_values": "Product-specific GHS classes and statements, jurisdiction, SDS revision and evidence status", "why_it_matters": "Makes handling decisions depend on the actual material and applicable documentation." } ], "affordances": [ "Resolve a supplier's calcium silicide label against composition, phase evidence and identifiers.", "Compare lots against an application's calcium content, phase purity, impurity and particle-size requirements.", "Determine which reported physical properties apply to the identified phase and material form.", "Flag a lot for reassessment after undocumented moisture, air or thermal exposure.", "Retrieve applicable handling and transport requirements from a matching current SDS.", "Record acceptance, rejection or a request for additional characterization with supporting evidence." ], "agent_conduct": { "may": [ "Describe calcium silicide's uses, for example in steelmaking, and state which phase and grade a record refers to.", "Report the water-reactivity hazard from the safety data sheet." ], "must_not": [ "Store or handle it where it can get wet or contact acids.", "Ship it without the dangerous goods classification and packaging the rules require.", "Provide guidance on using it in incendiary or improvised devices.", "Mix records for the defined compound with those for commercial alloys of variable composition." ], "requires_human": [ "Approving bulk storage, firefighting plans or disposal on a site." ] }, "ethics": { "considerations": [ "Workers and firefighters can be hurt when water-reactive materials are poorly labelled." ], "affected_parties": [ "Steelworks and foundry workers", "Firefighters", "Transport workers" ] }, "owners": { "steward": "The business that holds it; the supplier answers for its classification and labelling.", "master_systems": [ "Chemical substance inventories such as the EU REACH registration database" ] }, "visual_identification": [ "A grey, metallic-looking powder, granules or lumps.", "Packed in sealed, dry containers marked as dangerous when wet." ], "failure_modes_and_hazards": [ "Releases flammable gas on contact with water or acids.", "Dust can ignite and irritate the lungs.", "Water must not be used on fires involving it." ], "standards_and_regulation": [ "Globally Harmonized System of Classification and Labelling of Chemicals (GHS), United Nations.", "Recommendations on the Transport of Dangerous Goods, Model Regulations, United Nations." ], "what_it_is_for": [ "Calcium silicide is encountered in metallurgical supply chains and laboratories studying calcium-silicon compounds.", "Commercial calcium-silicon materials are used in steel treatment for deoxidation and inclusion modification, while defined calcium disilicide is also studied as a precursor for silicon-based materials." ] }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q416381: calcium silicide", "url": "https://www.wikidata.org/wiki/Q416381", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Calcium disilicide", "url": "https://en.wikipedia.org/wiki/Calcium_disilicide", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "chemical-identity", "name": "Chemical identity", "description": "Resolve what calcium silicide denotes for this registry entry and each material record.", "rationale": "Different calcium-silicon stoichiometries must not inherit one another's identifiers or properties.", "layers": [ { "id": "name-and-stoichiometry", "name": "Name and stoichiometry", "description": "Connect the generic name to an explicitly supported formula.", "findings": [ { "id": "formula-resolution", "name": "Formula resolution", "description": "Keep the registered name intact while recording whether evidence identifies a particular calcium silicide or leaves the composition unresolved.", "questions": [ { "text": "What formula does the registry's originating record actually denote?", "kind": "definition", "id": "formula-resolution-q01" }, { "text": "Does the material documentation identify a compound, a multiphase technical material or only a trade name?", "kind": "boundary", "id": "formula-resolution-q02" } ] } ] }, { "id": "identifier-alignment", "name": "Identifier alignment", "description": "Check that external identifiers describe the same resolved material.", "findings": [ { "id": "composition-linked-identifiers", "name": "Composition-linked identifiers", "description": "Attach CAS, EC and database references to their documented composition rather than to the unqualified name alone.", "questions": [ { "text": "Which read source supports each identifier and its associated formula?", "kind": "provenance", "id": "composition-linked-identifiers-q01" }, { "text": "Do the label, SDS and analytical certificate refer to the same calcium silicide identity?", "kind": "boundary", "id": "composition-linked-identifiers-q02" } ] } ] } ] }, { "id": "composition-and-phase-purity", "name": "Composition and phase purity", "description": "Describe the calcium-silicon phases and other constituents actually present.", "rationale": "An elemental assay cannot by itself demonstrate a pure calcium silicide phase.", "layers": [ { "id": "elemental-balance", "name": "Elemental balance", "description": "Establish measured calcium, silicon and relevant impurity contents.", "findings": [ { "id": "assay-basis", "name": "Assay basis", "description": "Record whether a purity claim means elemental content, compound content or another supplier-defined basis.", "questions": [ { "text": "What are the measured calcium and silicon mass fractions and their analytical uncertainties?", "kind": "measurement", "id": "assay-basis-q01" }, { "text": "What does the stated purity percentage measure, and which constituents are excluded from it?", "kind": "definition", "id": "assay-basis-q02" } ] } ] }, { "id": "phase-assemblage", "name": "Phase assemblage", "description": "Distinguish the intended silicide from other crystalline phases and residual elements.", "findings": [ { "id": "phase-evidence", "name": "Phase evidence", "description": "Use phase-sensitive characterization to assess the nominal formula and detect additional silicides, free elements or oxygen-bearing phases.", "questions": [ { "text": "Which phases are supported by diffraction or another suitable identification method?", "kind": "measurement", "id": "phase-evidence-q01" }, { "text": "Does the observed phase assemblage support the claimed grade, or require description as a mixture?", "kind": "boundary", "id": "phase-evidence-q02" } ] } ] } ] }, { "id": "physical-form-and-properties", "name": "Physical form and properties", "description": "Relate measurable behavior to calcium silicide phase, particle form and test conditions.", "rationale": "Powder behavior and phase-specific constants answer different questions about suitability.", "layers": [ { "id": "particle-and-packing-state", "name": "Particle and packing state", "description": "Describe particle dimensions and packing-dependent properties.", "findings": [ { "id": "size-and-density-basis", "name": "Size and density basis", "description": "Keep particle-size distributions and bulk density separate from intrinsic material density.", "questions": [ { "text": "What are the material form and measured particle-size distribution, including the fine fraction?", "kind": "measurement", "id": "size-and-density-basis-q01" }, { "text": "Is the reported density a phase density, skeletal density, loose bulk density or tapped bulk density?", "kind": "definition", "id": "size-and-density-basis-q02" } ] } ] }, { "id": "conditional-thermal-properties", "name": "Conditional thermal properties", "description": "Identify which thermal observations belong to the resolved phase and environment.", "findings": [ { "id": "thermal-event-assignment", "name": "Thermal event assignment", "description": "Require evidence distinguishing melting, phase transformation, decomposition and environmental reaction before assigning a thermal constant.", "questions": [ { "text": "Which thermal events were measured, under what atmosphere and pressure, and for which phase composition?", "kind": "measurement", "id": "thermal-event-assignment-q01" }, { "text": "Is a reported melting or boiling value experimentally supported for this material, or should it remain unassigned?", "kind": "provenance", "id": "thermal-event-assignment-q02" } ] } ] } ] }, { "id": "reactivity-and-material-condition", "name": "Reactivity and material condition", "description": "Connect the material's exposure history and reactive behavior to its present usability.", "rationale": "Nominal identity alone does not establish the condition or handling requirements of a calcium silicide lot.", "layers": [ { "id": "exposure-and-alteration", "name": "Exposure and alteration", "description": "Track potentially consequential contact with moisture, air and other environments.", "findings": [ { "id": "condition-evidence", "name": "Condition evidence", "description": "Record exposure history and evidence of alteration without treating visual appearance as proof of chemical stability.", "questions": [ { "text": "What moisture, air or temperature exposure has occurred since the lot was characterized?", "kind": "provenance", "id": "condition-evidence-q01" }, { "text": "What evidence indicates a change in surface composition, phase content or material performance?", "kind": "measurement", "id": "condition-evidence-q02" } ] } ] }, { "id": "reactive-contact-constraints", "name": "Reactive contact constraints", "description": "Establish documented incompatibilities for the identified grade and form.", "findings": [ { "id": "water-reactivity-applicability", "name": "Water-reactivity applicability", "description": "The CaSi2 record reports flammable-gas hazards on water contact; the agent must establish applicable controls from documentation matching the actual product. [PubChem CaSi2 safety information](https://pubchem.ncbi.nlm.nih.gov/compound/Calcium-silicide-_CaSi2).", "questions": [ { "text": "What water-contact, air-exposure and chemical-incompatibility hazards are documented for this grade and particle form?", "kind": "provenance", "id": "water-reactivity-applicability-q01" }, { "text": "Which contemplated contacts or operations require restriction under the matching SDS and approved procedure?", "kind": "action", "id": "water-reactivity-applicability-q02" } ] } ] } ] }, { "id": "use-qualification-and-controls", "name": "Use qualification and controls", "description": "Translate calcium silicide specifications and applicable hazard records into traceable material decisions.", "rationale": "A matching chemical name is insufficient for either application acceptance or handling authorization.", "layers": [ { "id": "application-acceptance", "name": "Application acceptance", "description": "Compare the actual lot with requirements imposed by its intended material role.", "findings": [ { "id": "lot-to-use-match", "name": "Lot-to-use match", "description": "Assess calcium and silicon contributions, phase content, contaminants and feed form against explicit application criteria.", "questions": [ { "text": "What calcium content, silicide phase, impurity limits and particle-size requirements does the intended use impose?", "kind": "boundary", "id": "lot-to-use-match-q01" }, { "text": "Does the lot meet those requirements, or what additional evidence is required before acceptance?", "kind": "action", "id": "lot-to-use-match-q02" } ] } ] }, { "id": "classification-and-handling-evidence", "name": "Classification and handling evidence", "description": "Associate product-specific regulatory and handling records with their jurisdiction and revision.", "findings": [ { "id": "applicable-material-controls", "name": "Applicable material controls", "description": "Record supported hazard classifications, transport designations, exposure limits and storage requirements without transferring them between unresolved calcium silicide identities.", "questions": [ { "text": "Which current SDS and jurisdiction-specific records apply to this exact composition and supplied form?", "kind": "provenance", "id": "applicable-material-controls-q01" }, { "text": "Are exposure limits specific to this substance, applicable to identified constituents or dust categories, or not established?", "kind": "boundary", "id": "applicable-material-controls-q02" }, { "text": "What documented storage, handling and transport conditions must be satisfied for the proposed activity?", "kind": "action", "id": "applicable-material-controls-q03" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-confidence-notes", "name": "Check these first", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "This is recalled knowledge, without consulted sources; first establish whether the registry intends CaSi2 specifically or calcium-silicon materials more broadly.", "Verify CAS and EC identifiers, phase-specific physical constants, and any exposure limits before adding them.", "Confirm hazard and transport classifications from documentation for the actual grade and particle size; formula-derived mass fractions are not commercial purity specifications." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of calcium silicide this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-kinds", "name": "Kinds and varieties", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Calcium disilicide (CaSi2)", "Calcium monosilicide (CaSi)", "Commercial calcium-silicon metallurgical grades" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of calcium silicide this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "scheme": "Chemical formula", "value_or_pattern": "CaSi2", "note": "Identifies calcium disilicide; the unqualified name calcium silicide does not guarantee this composition." }, { "scheme": "CAS Registry Number", "value_or_pattern": "Up to seven digits, hyphen, two digits, hyphen, one check digit", "note": "Confirm the assigned number against the specific compound or commercial material." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of calcium silicide this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-standards-and-regulation", "name": "Standards and regulation", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS): framework for communicating chemical hazards; the applicable classification requires confirmation for the supplied material." ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of calcium silicide this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Deoxidation and desulfurization during steelmaking using calcium-silicon metallurgical products.", "Modification of nonmetallic inclusions in steel.", "Fuel component in some pyrotechnic compositions.", "Calcium disilicide as a precursor for preparing silicon-based layered materials." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of calcium silicide this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "quantity": "Calcium mass fraction in stoichiometric CaSi2", "typical_range": "Approximately 41.6, calculated from the formula", "unit": "%" }, { "quantity": "Silicon mass fraction in stoichiometric CaSi2", "typical_range": "Approximately 58.4, calculated from the formula", "unit": "%" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of calcium silicide this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Contact with water or acids can release flammable hydrogen; reaction behavior depends on composition and physical form.", "Finely divided material can present a greater ignition hazard than bulk material.", "Mixing with oxidizing agents can produce energetic reactions.", "Moisture exposure and surface oxidation can degrade storage stability and metallurgical performance." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of calcium silicide this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "name": "Calcium-silicon alloy", "difference": "A commercial alloy is specified by bulk composition and impurities and may contain multiple phases; CaSi2 specifies a particular compound." }, { "name": "Calcium carbide", "difference": "Calcium carbide contains carbon rather than silicon and has the formula CaC2." }, { "name": "Ferrosilicon", "difference": "Ferrosilicon is principally an iron-silicon alloy rather than a calcium-silicon material." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of calcium silicide this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Does the registry's originating record intend calcium disilicide specifically or a broader calcium silicide identity?", "Which CAS, EC and PubChem identifiers belong to that intended identity, and how should technical mixtures be linked without changing registry granularity?", "Which phases, impurities and assay conventions occur in the grades relevant to this registry entry?", "Which thermal constants and exposure-dependent changes are supported by measurements for those phases and forms?", "Which current hazard classifications, transport requirements and exposure limits apply across the relevant supplied grades and jurisdictions?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 18, "questions": 29 } }