{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T10:09:38Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 18.8, "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: 01a09516-f3aa-7510-b6cb-c06ce9fc95d0\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: hafnium tetrafluoride\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", "usd": 0.0, "recall": true }, "codex": { "seconds": 74.7, "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: 01a09516-f3af-7cc3-986e-0166972a922b\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: hafnium tetrafluoride\nRegistry id: vr.tr.hafnium-tetrafluoride\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into t" } }, "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T12:00:00Z", "ingestedAt": "2026-10-06T08:53:27+00:00", "fields": [ "agent_conduct", "ethics", "failure_modes_and_hazards", "owners", "standards_and_regulation", "visual_identification" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:31+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q4493197", "registryId": "vr.tr.hafnium-tetrafluoride", "name": "hafnium tetrafluoride", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q4493197/", "model": { "registry_id": "vr.tr.hafnium-tetrafluoride", "name": "hafnium tetrafluoride", "purpose": "Enable an AI agent to identify hafnium tetrafluoride, assess the condition and suitability of a material lot, and determine which handling or use decisions require further evidence.", "definition": "Hafnium tetrafluoride is the inorganic compound HfF4, a fluoride of hafnium in the +4 oxidation state that forms a crystalline solid under ordinary conditions.", "scope_statement": "This model owns the substance identity and material-state requirements of hafnium tetrafluoride under registry entry vr.tr.hafnium-tetrafluoride in PHY / PHY.MAT, including composition, grade, hydration, phase, impurities and evidence needed for safe use.", "in_scope": [ "HfF4 identity and correspondence among chemical names and identifiers", "Lot composition, assay basis and zirconium or other impurities", "Water content, hydration and evidence of chemical alteration", "Physical form and condition-dependent thermal properties", "Substance-specific hazard evidence and application acceptance criteria" ], "out_of_scope": [ "Hafnium metal, hafnium oxide and other hafnium compounds as independent substances", "Fluorohafnate salts containing counterions as independent substances", "Finished glasses, coatings or mixtures containing HfF4", "Manufacturing plants and detailed synthesis procedures", "Packaging products, transport operations and facility emergency plans" ], "distinguishing_features": [ "Confirm HfF4 composition, with a nominal fluorine-to-hafnium atomic ratio of 4:1; appearance alone cannot establish identity.", "Verify CAS 13709-52-9 against the formula and substance name; these agree in the [NIST Chemistry WebBook](https://webbook.nist.gov/cgi/formula?ID=C13709529).", "Use elemental analysis to distinguish hafnium tetrafluoride from zirconium tetrafluoride and quantify zirconium in a nominal HfF4 lot.", "Determine whether water is adsorbed, structurally incorporated or associated with chemical alteration before treating material as anhydrous HfF4.", "Check oxygen, other anions and counterions to distinguish HfF4 from hafnium oxide, oxyfluoride-containing material and fluorohafnate salts." ], "characteristics": [ { "name": "Chemical identity", "kind": "category", "unit_or_values": "HfF4; hafnium(IV) fluoride; CAS 13709-52-9", "why_it_matters": "Anchors recognition to composition and a checked identifier; formula and CAS are supported by the [NIST Chemistry WebBook](https://webbook.nist.gov/cgi/formula?ID=C13709529)." }, { "name": "Molar mass", "kind": "measurement", "unit_or_values": "254.48 g/mol for HfF4", "why_it_matters": "Supports amount calculations for the stated formula; hydrated or impure material requires correction. Reference: [NIST Chemistry WebBook](https://webbook.nist.gov/cgi/formula?ID=C13709529)." }, { "name": "Assay and purity basis", "kind": "measurement", "unit_or_values": "Mass percent; specify total-material, dry or metals basis", "why_it_matters": "A metals-basis purity claim does not by itself constrain water, oxygen or all nonmetal contaminants." }, { "name": "Fluorine-to-hafnium ratio", "kind": "measurement", "unit_or_values": "mol F/mol Hf; nominal value 4", "why_it_matters": "Tests stoichiometric consistency but requires phase and impurity evidence to exclude mixtures." }, { "name": "Zirconium and other elemental impurities", "kind": "measurement", "unit_or_values": "mg/kg, with analytical method and detection limits", "why_it_matters": "Distinguishes chemical identity from grade suitability and prevents an unspecified purity claim from concealing relevant contamination." }, { "name": "Water and hydration condition", "kind": "state", "unit_or_values": "Verified anhydrous, adsorbed moisture, identified hydrate, altered or unresolved; water in mg/kg or mass percent", "why_it_matters": "Controls the validity of formula-based dosing and whether a lot meets a moisture-sensitive use specification." }, { "name": "Phase and particle form", "kind": "category", "unit_or_values": "Measured phase identification; powder or other observed form; particle-size distribution in µm", "why_it_matters": "Supports phase confirmation, representative sampling and assessment of dust generation." }, { "name": "Thermal behavior", "kind": "measurement", "unit_or_values": "Transition temperature in °C or K; pressure in Pa; atmosphere, method and event type required", "why_it_matters": "Prevents melting, sublimation, dehydration and decomposition observations from being treated as interchangeable constants." }, { "name": "Hazard and exposure classification", "kind": "relation", "unit_or_values": "Applicable SDS and regulatory source, jurisdiction, revision date, GHS categories and exposure-limit basis", "why_it_matters": "Connects handling decisions to evidence applicable to the actual material and distinguishes fluoride-based limits from HfF4-specific limits." }, { "name": "Application qualification", "kind": "state", "unit_or_values": "Qualified, rejected or pending against a named specification", "why_it_matters": "Chemical identity alone cannot establish suitability for a particular fluoride-material formulation or process." } ], "affordances": [ "Match a supplier lot to the registered HfF4 identity using identifiers and analytical evidence.", "Calculate HfF4-equivalent quantity using assay, water content and the declared measurement basis.", "Accept, reject or quarantine a lot against explicit impurity, hydration and phase requirements.", "Select further characterization when composition or thermal observations do not establish material identity.", "Determine handling prerequisites from applicable hazard evidence and documented compatibility information." ], "agent_conduct": { "may": [ "Describe hafnium tetrafluoride's structure and uses, for example in optical coatings and materials research.", "Report the hazards of fluorides from its safety data sheet." ], "must_not": [ "Handle it without the protective equipment its safety data sheet requires.", "Store it where moisture or acids can release hydrogen fluoride.", "Dispose of fluoride waste into drains or general rubbish." ], "requires_human": [ "Approving its use or disposal in a laboratory or plant." ] }, "ethics": { "considerations": [ "Fluoride exposure can cause serious injuries that workers may not notice at first." ], "affected_parties": [ "Laboratory and plant workers", "Waste handlers" ] }, "owners": { "steward": "The laboratory or manufacturer that holds it; the supplier answers for its identity and labelling.", "master_systems": [] }, "visual_identification": [ "A white crystalline powder; identity needs analysis and a reliable label." ], "failure_modes_and_hazards": [ "Can release hydrogen fluoride with acids or moisture, causing deep burns.", "Toxic if swallowed or inhaled as dust." ], "standards_and_regulation": [ "Globally Harmonized System of Classification and Labelling of Chemicals (GHS), United Nations." ], "what_it_is_for": [ "Hafnium tetrafluoride is encountered in specialized inorganic chemistry laboratories and materials processing facilities.", "It serves as a hafnium source in fluoride chemistry and in the preparation of certain specialty fluoride glasses.", "Its suitability for a particular process depends on documented purity, moisture content and material condition." ] }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q4493197: hafnium tetrafluoride", "url": "https://www.wikidata.org/wiki/Q4493197", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Hafnium tetrafluoride", "url": "https://en.wikipedia.org/wiki/Hafnium_tetrafluoride", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "identity-and-chemical-boundaries", "name": "Identity and chemical boundaries", "description": "Establish what qualifies as hafnium tetrafluoride and where neighbouring chemical identities begin.", "rationale": "A hafnium-bearing fluoride, hydrate or formulation cannot be accepted as anhydrous HfF4 from its trade name alone.", "layers": [ { "id": "formula-and-identifiers", "name": "Formula and identifiers", "description": "Connect the registry entry to verified chemical identity.", "findings": [ { "id": "hff4-identity-anchor", "name": "HfF4 identity anchor", "description": "NIST records formula F4Hf and CAS 13709-52-9 for hafnium tetrafluoride. Preserve identifier provenance and distinguish database representations from the physical structure of a sample. Reference: [NIST Chemistry WebBook](https://webbook.nist.gov/cgi/formula?ID=C13709529).", "questions": [ { "text": "Do the sample label, certificate and identifier records consistently identify HfF4?", "kind": "definition", "id": "hff4-identity-anchor-q01" }, { "text": "Which authoritative records establish the applicable CAS, EC and PubChem identifiers, including any alternate representations?", "kind": "provenance", "id": "hff4-identity-anchor-q02" } ] } ] }, { "id": "adjacent-fluoride-identities", "name": "Adjacent fluoride identities", "description": "Separate tetrafluoride identity from related compounds and mixtures.", "findings": [ { "id": "composition-boundary-evidence", "name": "Composition boundary evidence", "description": "Require evidence for hafnium, fluoride, water, oxygen and relevant counterions before assigning a questionable sample to the HfF4 identity.", "questions": [ { "text": "What evidence excludes ZrF4, hafnium oxide or oxyfluoride-containing material as the principal substance?", "kind": "boundary", "id": "composition-boundary-evidence-q01" }, { "text": "Does detected water or a counterion indicate a separately identified compound, a mixture or contamination of an HfF4 lot?", "kind": "boundary", "id": "composition-boundary-evidence-q02" } ] } ] } ] }, { "id": "composition-and-grade", "name": "Composition and grade", "description": "Determine what a lot contains and whether its purity claim supports the intended use.", "rationale": "Nominal HfF4 composition and a headline purity percentage leave important questions about zirconium, water and analytical coverage unresolved.", "layers": [ { "id": "assay-interpretation", "name": "Assay interpretation", "description": "Make purity claims comparable and suitable for quantity calculations.", "findings": [ { "id": "assay-basis-and-coverage", "name": "Assay basis and coverage", "description": "Record whether the assay measures HfF4 directly or is inferred from elemental measurements, and identify which constituents its purity basis excludes.", "questions": [ { "text": "Is the stated purity on a total-material, dry or metals basis, and what does that basis omit?", "kind": "measurement", "id": "assay-basis-and-coverage-q01" }, { "text": "Do hafnium and fluorine measurements support the nominal 4:1 atomic ratio within stated uncertainty?", "kind": "measurement", "id": "assay-basis-and-coverage-q02" } ] } ] }, { "id": "impurity-acceptance", "name": "Impurity acceptance", "description": "Relate measured contaminants to a specific application specification.", "findings": [ { "id": "zirconium-and-nonmetal-controls", "name": "Zirconium and nonmetal controls", "description": "Track zirconium separately from other metals and record water, oxygen and residual anions where the application requires them.", "questions": [ { "text": "What are the measured zirconium and other specified impurity concentrations, including detection limits?", "kind": "measurement", "id": "zirconium-and-nonmetal-controls-q01" }, { "text": "Which documented limits determine whether this HfF4 lot is accepted, rejected or held for further analysis?", "kind": "action", "id": "zirconium-and-nonmetal-controls-q02" } ] } ] } ] }, { "id": "hydration-phase-and-thermal-state", "name": "Hydration, phase and thermal state", "description": "Characterize the actual material state and interpret changes under environmental or thermal exposure.", "rationale": "The formula HfF4 does not establish the water content, crystalline phase or meaning of an observed thermal event.", "layers": [ { "id": "water-and-phase-identification", "name": "Water and phase identification", "description": "Determine whether a nominal HfF4 sample retains its claimed material state.", "findings": [ { "id": "anhydrous-status-evidence", "name": "Anhydrous status evidence", "description": "Treat anhydrous status as an evidence-backed lot condition, distinguishing adsorbed moisture from an identified hydrated phase or chemical alteration.", "questions": [ { "text": "Which validated measurements distinguish adsorbed water, structural water and oxygen-containing alteration products in this sample?", "kind": "measurement", "id": "anhydrous-status-evidence-q01" }, { "text": "What exposure history or analytical change invalidates the lot's previous anhydrous designation?", "kind": "action", "id": "anhydrous-status-evidence-q02" } ] } ] }, { "id": "thermal-event-interpretation", "name": "Thermal event interpretation", "description": "Attach physical-property claims to the conditions and transformations actually observed.", "findings": [ { "id": "qualified-transition-records", "name": "Qualified transition records", "description": "Record temperature, pressure, atmosphere, initial composition and event assignment before using a reported thermal value to judge HfF4 behavior.", "questions": [ { "text": "Does each reported temperature represent melting, sublimation, dehydration, decomposition or an unresolved event?", "kind": "measurement", "id": "qualified-transition-records-q01" }, { "text": "What phase or evolved-species evidence supports applying that observation to the current HfF4 lot?", "kind": "provenance", "id": "qualified-transition-records-q02" } ] } ] } ] }, { "id": "handling-and-use-decisions", "name": "Handling and use decisions", "description": "Connect HfF4 condition and hazard evidence to practical handling and application decisions.", "rationale": "An agent needs an explicit basis for decisions involving fluoride exposure, compatibility and material qualification.", "layers": [ { "id": "hazard-evidence-and-compatibility", "name": "Hazard evidence and compatibility", "description": "Resolve the applicable hazard information for the supplied form and proposed conditions.", "findings": [ { "id": "applicable-fluoride-hazard-record", "name": "Applicable fluoride hazard record", "description": "Require a current, applicable SDS and supporting evidence for exposure routes, incompatibilities and possible hazardous releases; do not infer a universal classification from the formula.", "questions": [ { "text": "Which GHS classifications and exposure limits apply in the relevant jurisdiction, and are limits expressed as fluoride, hafnium or HfF4?", "kind": "provenance", "id": "applicable-fluoride-hazard-record-q01" }, { "text": "What documented conditions could produce hazardous fluoride-containing releases, including HF, and what controls follow for the proposed operation?", "kind": "action", "id": "applicable-fluoride-hazard-record-q02" } ] } ] }, { "id": "storage-and-application-release", "name": "Storage and application release", "description": "Determine whether the lot can be stored, transferred or released to a specified use.", "findings": [ { "id": "condition-dependent-release", "name": "Condition-dependent release", "description": "Base release on verified composition, moisture condition, compatible contact materials and application-specific acceptance criteria.", "questions": [ { "text": "Which documented storage atmosphere and container-contact requirements preserve this lot's qualified condition?", "kind": "action", "id": "condition-dependent-release-q01" }, { "text": "What assay, water, phase and impurity evidence must be current before using the lot in the named formulation or process?", "kind": "action", "id": "condition-dependent-release-q02" } ] } ] } ] }, { "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 a recall-based description; no sources were consulted.", "Verify CAS, PubChem and EC identifiers, current hazard classifications and any applicable exposure limits.", "Verify phase-transition temperatures, hydration behavior and grade-specific uses against authoritative chemical references." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of hafnium tetrafluoride 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": "HfF4", "note": "One hafnium atom per four fluorine atoms." }, { "scheme": "Stock nomenclature", "value_or_pattern": "hafnium(IV) fluoride", "note": "The Roman numeral specifies the oxidation state of hafnium." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of hafnium tetrafluoride 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": [ "Component of specialized fluoride glass compositions studied for infrared optical applications.", "Starting material for preparing other hafnium compounds." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of hafnium tetrafluoride 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": "Molar mass", "typical_range": "254.48", "unit": "g/mol" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of hafnium tetrafluoride 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": [ "Moisture-induced hydrolysis can generate hydrogen fluoride and alter the material's composition.", "Dust exposure requires control because the material contains chemically bound fluoride; substance-specific toxicity should be checked.", "Water, oxygen-containing impurities and other contaminants can compromise performance in optical-material applications." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of hafnium tetrafluoride 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": "Zirconium tetrafluoride", "difference": "ZrF4 contains zirconium rather than hafnium; the compounds are chemically similar but distinct substances." }, { "name": "Hafnium tetrachloride", "difference": "HfCl4 contains chloride rather than fluoride." }, { "name": "Hafnium dioxide", "difference": "HfO2 is an oxide rather than a fluoride, although hafnium has the +4 oxidation state in both." }, { "name": "Hafnium-containing fluoride glass", "difference": "A glass is a multicomponent material that may incorporate HfF4, rather than the pure compound itself." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of hafnium tetrafluoride this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Which primary crystallographic studies establish the anhydrous and hydrated phases relevant to this entry, and how should identified hydrates be linked without silently expanding registry scope?", "What reliable melting, sublimation, vapor-pressure and decomposition measurements exist, with pressure, atmosphere and sample composition specified?", "Which EC and PubChem records best match the registry substance, and how should conflicting or alternate database representations be reconciled?", "Which current jurisdiction-specific hazard classifications and exposure limits apply, and what direct evidence establishes moisture-, acid- or heat-related HF release?", "What validated analytical methods and application-specific limits adequately constrain zirconium, oxygen, water and other impurities in commercial HfF4 grades?" ], "statistics": { "bundles": 5, "layers": 9, "findings": 14, "questions": 22 } }