{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.neodymium-iii-fluoride","code":"thing-q1361951","url":"https://ver.cy/models/thing/q1361951/","name":"neodymium(III) fluoride","alternateNames":[],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.MAT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"Neodymium(III) fluoride is an inorganic compound with formula NdF3, consisting of neodymium in the +3 oxidation state and fluoride ions, normally encountered as a crystalline solid.","purpose":"Enable an agent to identify neodymium(III) fluoride, assess a particular sample, and determine its suitability for a specified use under documented conditions.","scope":{"in":["NdF3 identity and links to chemical identifiers","Neodymium-to-fluorine stoichiometry, purity basis, and impurity profile","Crystalline phase, particle form, moisture, and storage condition","Measured thermal, dissolution, and application-relevant properties","Substance-specific hazard evidence and jurisdiction-dependent status","Sample qualification and traceability to analytical evidence"],"out":["Neodymium metal, oxides, oxyfluorides, and other fluorides as independent substances","Mixed rare-earth fluorides and Nd-doped host materials as complete materials","Manufacturing routes and processing equipment","Finished optical components, magnets, and other products","Facility exposure-control systems and waste-treatment operations"],"boundaries":[]},"distinguishingFeatures":["Check that the assigned identity is NdF3 with neodymium in oxidation state +3, rather than accepting the ambiguous label 'neodymium fluoride'.","Combine Nd:F composition measurements with phase identification; a nominal 1:3 ratio alone does not establish a single NdF3 phase.","Measure oxygen and identify oxygen-bearing phases to distinguish NdF3 from neodymium oxide or oxyfluoride contamination.","Quantify other rare-earth elements to distinguish an NdF3 grade from a mixed rare-earth fluoride material.","Establish whether NdF3 is the substance being supplied or merely a constituent or precursor associated with another material."],"structure":{"bundles":[{"id":"ndf3-identity","name":"NdF3 identity","description":"Establishes what belongs to the registered substance and how an actual sample supports that assignment.","layers":[{"id":"chemical-record","name":"Chemical record","description":"Connects the registry entry to a chemically explicit identity.","findings":[{"id":"identifier-agreement","name":"Identifier agreement","description":"Require agreement between formula, oxidation-state designation, and external identifiers.","questions":[{"text":"Do the formula and identifiers resolve specifically to neodymium(III) fluoride, NdF3?","id":"identifier-agreement-q01","kind":"definition"},{"text":"Which authoritative record supports each identifier, and when was it checked?","id":"identifier-agreement-q02","kind":"provenance"}]}]},{"id":"sample-identity","name":"Sample identity","description":"Separates nominal labeling from analytical identification.","findings":[{"id":"composition-and-phase-confirmation","name":"Composition and phase confirmation","description":"Evaluate elemental composition together with phase evidence and the sample's relationship to mixtures or host materials.","questions":[{"text":"Which measurements jointly support NdF3 stoichiometry and phase identity?","id":"composition-and-phase-confirmation-q01","kind":"measurement"},{"text":"Is this an NdF3 sample, a mixture containing NdF3, or a different material containing neodymium and fluorine?","id":"composition-and-phase-confirmation-q02","kind":"boundary"}]}]}]},{"id":"grade-and-impurities","name":"Grade and impurities","description":"Makes purity claims and chemically important contaminants comparable.","layers":[{"id":"assay-basis","name":"Assay basis","description":"Records exactly what a quoted purity value measures.","findings":[{"id":"interpretable-purity","name":"Interpretable purity","description":"Distinguish total-material assay from metal-only or rare-earth-based specifications.","questions":[{"text":"What denominator and analytical method define the quoted NdF3 purity?","id":"interpretable-purity-q01","kind":"definition"},{"text":"Does the reported value exclude water, oxygen, nonmetal impurities, or other material components?","id":"interpretable-purity-q02","kind":"boundary"}]}]},{"id":"impurity-profile","name":"Impurity profile","description":"Captures rare-earth contamination separately from water and oxygen-bearing material.","findings":[{"id":"rare-earth-separation","name":"Rare-earth separation","description":"Require element-specific evidence where mixed rare-earth content affects identity or use.","questions":[{"text":"What are the measured concentrations and reporting limits for praseodymium and other rare-earth impurities?","id":"rare-earth-separation-q01","kind":"measurement"},{"text":"At what intended-use specification would this lot require treatment as mixed rare-earth material?","id":"rare-earth-separation-q02","kind":"boundary"}]},{"id":"water-and-oxygen-discrimination","name":"Water and oxygen discrimination","description":"Avoid interpreting all measured oxygen or heating mass loss as moisture.","questions":[{"text":"Which methods distinguish water from oxide, oxyfluoride, or other oxygen-bearing contamination?","id":"water-and-oxygen-discrimination-q01","kind":"measurement"},{"text":"What evidence would justify conditioning and retesting rather than rejecting the lot?","id":"water-and-oxygen-discrimination-q02","kind":"action"}]}]}]},{"id":"physical-and-thermal-state","name":"Physical and thermal state","description":"Describes the phase and physical form of NdF3 under specified conditions.","layers":[{"id":"phase-and-morphology","name":"Phase and morphology","description":"Connects crystalline-phase evidence to the supplied material form.","findings":[{"id":"phase-resolved-form","name":"Phase-resolved form","description":"Record phase assignments and particle characteristics with their measurement conditions.","questions":[{"text":"Which diffraction reference and measurement conditions support the NdF3 phase assignment?","id":"phase-resolved-form-q01","kind":"provenance"},{"text":"What particle-size distribution, agglomeration state, and surface area describe the supplied sample?","id":"phase-resolved-form-q02","kind":"measurement"}]}]},{"id":"thermal-events","name":"Thermal events","description":"Qualifies temperature-dependent observations before they guide processing.","findings":[{"id":"qualified-temperature-limits","name":"Qualified temperature limits","description":"Keep measured melting, phase transitions, decomposition, and volatilization distinct.","questions":[{"text":"Which observed thermal events are supported by measurements at a stated pressure and atmosphere?","id":"qualified-temperature-limits-q01","kind":"measurement"},{"text":"If a boiling point is reported, is it measured, estimated, or an observation of another thermal event?","id":"qualified-temperature-limits-q02","kind":"provenance"},{"text":"What temperature range is supported for the proposed use and this lot's impurity profile?","id":"qualified-temperature-limits-q03","kind":"action"}]}]}]},{"id":"chemical-condition-and-use","name":"Chemical condition and use","description":"Connects environmental exposure and measured behavior to an intended application.","layers":[{"id":"medium-and-exposure","name":"Medium and exposure","description":"Records what happens to the sample in relevant storage or contact conditions.","findings":[{"id":"condition-dependent-dissolution","name":"Condition-dependent dissolution","description":"Require a defined medium and analytical endpoints for dissolution or compatibility claims.","questions":[{"text":"What dissolved neodymium and fluoride concentrations are measured at the specified pH, temperature, and contact time?","id":"condition-dependent-dissolution-q01","kind":"measurement"},{"text":"Does the evidence distinguish equilibrium solubility from slow dissolution, reaction, or suspended particles?","id":"condition-dependent-dissolution-q02","kind":"boundary"}]},{"id":"storage-condition-evidence","name":"Storage condition evidence","description":"Track exposure history and verify any resulting change rather than assuming stability or deterioration.","questions":[{"text":"What humidity, atmosphere, container contact, and temperature history is known for the lot?","id":"storage-condition-evidence-q01","kind":"provenance"},{"text":"Which observed changes would trigger moisture analysis, phase analysis, or requalification?","id":"storage-condition-evidence-q02","kind":"action"}]}]},{"id":"application-qualification","name":"Application qualification","description":"Translates a proposed use into evidence requirements for the NdF3 material.","findings":[{"id":"use-specific-acceptance","name":"Use-specific acceptance","description":"Evaluate relevant properties without transferring claims from a finished product or an Nd-doped host to pure NdF3.","questions":[{"text":"What impurity, moisture, phase, and particle specifications must this NdF3 lot meet for the proposed use?","id":"use-specific-acceptance-q01","kind":"action"},{"text":"For an optical use, were the cited spectral properties measured on NdF3 itself or on neodymium in another host?","id":"use-specific-acceptance-q02","kind":"boundary"},{"text":"Which lot-specific measurements demonstrate compliance with the acceptance criteria?","id":"use-specific-acceptance-q03","kind":"measurement"}]}]}]},{"id":"hazards-and-decision-evidence","name":"Hazards and decision evidence","description":"Anchors handling, regulatory, and disposition decisions to applicable NdF3 evidence.","layers":[{"id":"hazard-applicability","name":"Hazard applicability","description":"Checks the scope and currency of safety information for the actual material form.","findings":[{"id":"classification-and-exposure-scope","name":"Classification and exposure scope","description":"Separate documented classification from unverified assumptions about fluoride compounds or rare-earth powders.","questions":[{"text":"Which current SDS and authoritative records support the hazard classification for the supplied NdF3 form and jurisdiction?","id":"classification-and-exposure-scope-q01","kind":"provenance"},{"text":"Do applicable exposure limits address NdF3 specifically, fluoride expressed as fluorine, or a defined particulate fraction?","id":"classification-and-exposure-scope-q02","kind":"boundary"},{"text":"What documented precautions apply to dust generation, incompatible contact, and the proposed heating conditions?","id":"classification-and-exposure-scope-q03","kind":"action"}]}]},{"id":"lot-disposition","name":"Lot disposition","description":"Maintains the evidence chain for acceptance, restriction, or rejection.","findings":[{"id":"traceable-release-decision","name":"Traceable release decision","description":"Link identity, analytical results, applicable requirements, and unresolved gaps to the specific lot decision.","questions":[{"text":"Which certificate, sample identifiers, analytical reports, and safety-document revisions support this lot's assessment?","id":"traceable-release-decision-q01","kind":"provenance"},{"text":"Which unresolved NdF3 identity, purity, or condition issue prevents release for the intended use?","id":"traceable-release-decision-q02","kind":"action"},{"text":"Which jurisdiction-specific inventory, transport, or waste requirements have been verified for the actual material and activity?","id":"traceable-release-decision-q03","kind":"provenance"}]}]}]},{"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.","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.","questions":[{"text":"Which of these check these first hold for the sense of neodymium(III) fluoride this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-kinds","name":"Kinds and varieties","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these kinds and varieties hold for the sense of neodymium(III) fluoride this model covers, and on what evidence?","id":"evidence-kinds-q01","kind":"provenance"}]},{"id":"evidence-identifiers","name":"Identifiers and schemes","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these identifiers and schemes hold for the sense of neodymium(III) fluoride this model covers, and on what evidence?","id":"evidence-identifiers-q01","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.","questions":[{"text":"Which of these standards and regulation hold for the sense of neodymium(III) fluoride this model covers, and on what evidence?","id":"evidence-standards-and-regulation-q01","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.","questions":[{"text":"Which of these real-world use hold for the sense of neodymium(III) fluoride this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-measurements","name":"Typical measurements","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these typical measurements hold for the sense of neodymium(III) fluoride this model covers, and on what evidence?","id":"evidence-measurements-q01","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.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of neodymium(III) fluoride this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-regional-variation","name":"Regional variation","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these regional variation hold for the sense of neodymium(III) fluoride this model covers, and on what evidence?","id":"evidence-regional-variation-q01","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.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of neodymium(III) fluoride this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe neodymium(III) fluoride and its role in rare-earth metal production and optics.","Report hazards and handling rules from safety data sheets."],"mustNot":["Handle the powder without dust control and protection required by the safety data sheet.","Expose it to strong acids in a way that releases hydrogen fluoride.","Mislabel its purity or origin in trade.","Dispose of fluoride waste against local rules."],"requiresHuman":["Approving supply chain claims about the origin of rare-earth materials."]},"ethics":{"considerations":["Rare-earth mining and processing can harm workers and communities near mines.","Fluoride compounds can harm health if dust is inhaled."],"affectedParties":["Workers in processing","Mining communities","Downstream manufacturers"]},"owners":{"steward":"The business that holds it; chemical safety and trade authorities regulate supply.","roles":[],"masterSystems":["National chemical inventories"]},"relations":[{"target":"Q11173","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.neodymium-iii-fluoride","Wikidata: Q1361951 (https://www.wikidata.org/wiki/Q1361951)"]},"properties":{"applicability":"required","items":["Chemical identity: NdF3; CAS 13709-42-7; PubChem CID 83676; EC 237-253-3","Nd:F stoichiometry: Molar ratio with analytical method and uncertainty; nominal Nd:F = 1:3","Purity and reporting basis: Mass % or other explicitly defined basis; distinguish total-material assay, trace-metals basis, and rare-earth or REO basis","Other rare-earth content: Individual elemental concentrations in mg/kg, with detection limits","Water and oxygen-bearing impurities: Water and oxygen in mg/kg or mass %, with methods and identified phases where available","Phase identity: Measured phase assignment, reference pattern, phase fractions, temperature, and pressure","Particle form: Particle-size distribution in µm; specific surface area in m²/g where relevant","Thermal behavior: Transition temperatures in °C or K, pressure, atmosphere, heating rate, and event assignment","Dissolution behavior: Dissolved Nd and fluoride in mol/L or mg/L, with solvent, pH, temperature, and equilibration time","Hazard and regulatory evidence: Applicable SDS, authoritative classification or inventory record, jurisdiction, revision date, and exposure-limit scope"]},"recognition":{"applicability":"required","items":["A pale pink or violet crystalline powder, typical of neodymium compounds.","Supplied in sealed containers labelled with the formula NdF3."]},"capabilities":{"applicability":"required","items":["Resolve supplier records to the registered NdF3 identity and flag conflicting identifiers.","Compare candidate lots using compatible purity bases and impurity limits.","Request phase, elemental, moisture, or particle analyses to close a specific qualification gap.","Assess suitability for a proposed thermal, chemical, or optical use against documented requirements.","Select handling and storage requirements from applicable evidence for the supplied form.","Accept, quarantine, or require requalification of a lot based on evidence and exposure history."]},"hazards":{"applicability":"required","items":["Fluoride toxicity from inhaled or ingested dust.","Release of hydrogen fluoride with strong acids."]},"interfaces":{"applicability":"required","items":["Globally Harmonized System of Classification and Labelling of Chemicals (GHS), United Nations."]},"context":{"applicability":"required","items":["Neodymium(III) fluoride is encountered in inorganic materials research and the preparation of rare-earth-containing materials.","It can serve as a neodymium source for fluoride glasses and optical materials and as a feedstock in metallurgical processing."]}},"sources":[{"title":"Wikidata item Q1361951: neodymium(III) fluoride","url":"https://www.wikidata.org/wiki/Q1361951","note":"identity and sense of the item"},{"title":"Wikipedia: Neodymium(III) fluoride","url":"https://en.wikipedia.org/wiki/Neodymium%28III%29_fluoride","note":"general description of the item"}],"openQuestions":["Which primary measurements establish NdF3 crystal phases, phase transitions, melting behavior, and any defensible boiling or volatilization data under specified conditions?","What dissolution and chemical-transformation evidence is reliable across relevant pH, temperature, humidity, and contact media?","Which analytical methods adequately distinguish water, oxide, and oxyfluoride contamination at the concentrations relevant to the intended use?","What current hazard classifications and exposure limits apply in the target jurisdiction, and how much of their evidence is specific to NdF3?","Which intended application and acceptance specification should govern qualification, including whether any optical claims concern NdF3 itself or an Nd-doped host?"],"resources":{"spec":"/models/things/publications/thing-q1361951/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1361951/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T11:33:46Z","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":"filled","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 2026-10-07T10:10:26+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}