{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.rhodium","code":"thing-q1087","url":"https://ver.cy/models/thing/q1087/","name":"rhodium","alternateNames":["rhodium-102","rhodium-89","rhodium-90","rhodium-90m","rhodium-91","rhodium-91m","rhodium-92","rhodium-92m","rhodium-93","rhodium-94","rhodium-94m","rhodium-95"],"kind":"thing","status":"published","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.MAT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The chemical element with atomic number forty-five, a rare, hard, silvery-white platinum group metal that is highly reflective and corrosion-resistant, with one stable isotope, rhodium-103, and many radioactive isotopes, obtained as a by-product of platinum and nickel mining mainly in South Africa and Russia, and used above all in catalytic converters to reduce nitrogen oxides, as well as in chemical catalysts, electrical contacts, jewellery plating and mirrors; rhodium is among the most expensive metals and its price is highly volatile.","purpose":"Let an agent explain rhodium as an element and its properties, describe uses in catalysis and industry, present supply and market information with attribution, and support learning.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Catalytic activity","Extreme rarity","High reflectivity","Price volatility"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What rhodium is.","layers":[{"id":"element","name":"Element","description":"The element.","findings":[{"id":"element-finding","name":"Element","description":"Element.","questions":[{"text":"What are the properties, occurrence and chemistry of rhodium?","kind":"definition"},{"text":"Which entry fits platinum group metals?","kind":"action"}]}]},{"id":"isotopes","name":"Isotopes","description":"Isotopes and compounds.","findings":[{"id":"isotopes-finding","name":"Isotopes","description":"Isotopes.","questions":[{"text":"What isotopes and important compounds of rhodium exist?","kind":"definition"},{"text":"Which entry fits a specific compound?","kind":"action"}]}]}]},{"id":"use","name":"Use","description":"Uses.","layers":[{"id":"catalysis","name":"Catalysis","description":"Catalysis.","findings":[{"id":"catalysis-finding","name":"Catalysis","description":"Catalysis.","questions":[{"text":"How is rhodium used in catalytic converters and chemical catalysis?","kind":"provenance"},{"text":"Which entry fits catalytic converters?","kind":"action"}]}]},{"id":"other","name":"Other","description":"Other uses.","findings":[{"id":"other-finding","name":"Other","description":"Other.","questions":[{"text":"How is rhodium used in plating, contacts, mirrors and instruments?","kind":"provenance"},{"text":"Which entry fits a specific application?","kind":"action"}]}]}]},{"id":"market","name":"Market","description":"Supply and market.","layers":[{"id":"supply","name":"Supply","description":"Supply.","findings":[{"id":"supply-finding","name":"Supply","description":"Supply.","questions":[{"text":"Where is rhodium produced, and why is supply so concentrated?","kind":"provenance"},{"text":"Which entry fits mining?","kind":"action"}]}]},{"id":"market","name":"Market","description":"Market and theft.","findings":[{"id":"market-finding","name":"Market","description":"Market.","questions":[{"text":"Why is the rhodium price so volatile, and how has it driven catalytic converter theft, according to reports?","kind":"provenance"},{"text":"Is personal investment advice being sought, which is out of scope?","kind":"boundary"}]}]}]},{"id":"learn","name":"Learn","description":"History and teaching.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How was rhodium discovered and named?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"teach","name":"Teach","description":"Teaching.","findings":[{"id":"teach-finding","name":"Teach","description":"Teaching.","questions":[{"text":"How can rhodium illustrate catalysis and resource economics?","kind":"action"},{"text":"Which misconceptions arise?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe rhodium, its properties and uses such as catalytic converters and plating.","Track the origin and custody of rhodium in supply chains it is authorized to manage.","Report plating and fineness from assay records."],"mustNot":["Present rhodium-plated items as solid rhodium or another metal.","Help steal catalytic converters or trade rhodium of unknown origin.","Give investment advice on rhodium.","Release rhodium compounds where workers may breathe them."],"requiresHuman":["Buying or selling rhodium on someone's behalf."]},"ethics":{"considerations":["Mining of platinum group metals affects workers and communities.","Converter theft for rhodium harms ordinary vehicle owners."],"affectedParties":["Miners and refinery workers","Vehicle owners","Buyers"]},"owners":{"steward":"The person or company that holds it; assay offices certify fineness.","roles":[],"masterSystems":[]},"relations":[{"target":"Q223995","type":"parent","note":"registry parent class"},{"target":"platinum group","type":"related","note":"category"},{"target":"platinum","type":"related","note":"another platinum group metal entry"},{"target":"iridium","type":"related","note":"another platinum group metal entry"},{"target":"yttrium","type":"related","note":"another metal entry"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.rhodium","Wikidata: Q1087 (https://www.wikidata.org/wiki/Q1087)"]},"properties":{"applicability":"required","items":["Density: Approximately 12.4 grams per cubic centimetre - This approximate value applies to solid bulk metal near room temperature.","Melting point: Approximately 1964 degrees Celsius - This approximate value applies to pure metal near standard atmospheric pressure.","Electrical resistivity:  ohm metres - Measure resistivity on a specimen of known geometry at a stated temperature and purity."]},"recognition":{"applicability":"required","items":["Atomic number forty-five","Platinum group, highly reflective","Platinum and palladium are related metals used in similar catalysts","A hard, highly reflective silvery-white metal."]},"capabilities":{"applicability":"required","items":["explain the element","describe uses","present supply and market information","support learning"]},"hazards":{"applicability":"required","items":["Personal investment advice, which is out of scope","Theft of catalytic converters for rhodium","Supply concentration and volatility"]},"interfaces":{"applicability":"required","items":["Emissions regulations driving catalyst demand","Commodity market regulation","Chemical safety rules"]},"context":{"applicability":"required","items":["Element forty-five, a platinum group metal.","rhodium metal and alloys","rhodium isotopes","rhodium compounds and catalysts","rhodium plating","rhodium in catalytic converters"]}},"sources":[{"title":"Wikidata item Q1087: rhodium","url":"https://www.wikidata.org/wiki/Q1087","note":"identity and sense of the item"},{"title":"Wikipedia: Rhodium","url":"https://en.wikipedia.org/wiki/Rhodium","note":"general description of the item"}],"openQuestions":["Should catalytic converters be a separate entry?","How should market data be linked?","How should mining data be linked?"],"resources":{"spec":"/models/things/publications/thing-q1087/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1087/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T04:21:31Z","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 2026-10-07T10:10:25+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}