{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.tellurium","code":"thing-q1100","url":"https://ver.cy/models/thing/q1100/","name":"tellurium","alternateNames":["tellurium-126","tellurium-106","tellurium-113","tellurium-117","tellurium-105","tellurium-115m1","tellurium-115m2","tellurium-117m","tellurium-119m","tellurium-121m","tellurium-123m","tellurium-125m"],"kind":"thing","status":"published","version":"0.2.0-wave.3","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.MAT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A brittle, silvery-white metalloid, chemical element 52, in group 16 with sulfur and selenium; rare in the crust and obtained mainly as a by-product of copper refining, it is used in cadmium telluride solar cells, thermoelectric devices, steel and copper alloys, rubber vulcanisation and rewritable optical media.","purpose":"Let an agent explain tellurium as an element and material, relay its uses, supply and hazards from reference and regulatory sources, and separate it from selenium and from its compounds.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Metalloid of group 16","Obtained as a by-product of copper refining","Key material for cadmium telluride photovoltaics","Exposure causes garlic-like breath odour"],"structure":{"bundles":[{"id":"element","name":"Element","description":"What tellurium is.","layers":[{"id":"properties","name":"Properties","description":"Properties.","findings":[{"id":"properties-finding","name":"Properties","description":"Properties.","questions":[{"text":"What are the physical and chemical properties and isotopes of tellurium?","kind":"definition"},{"text":"Is the question about the element, a telluride compound or selenium?","kind":"boundary"}]}]},{"id":"occurrence","name":"Occurrence","description":"Occurrence and production.","findings":[{"id":"occurrence-finding","name":"Occurrence","description":"Occurrence.","questions":[{"text":"Where does tellurium occur, and how is it produced from copper refining?","kind":"provenance"},{"text":"Which entry fits copper refining?","kind":"action"}]}]}]},{"id":"use","name":"Use","description":"Applications.","layers":[{"id":"applications","name":"Applications","description":"Uses.","findings":[{"id":"applications-finding","name":"Applications","description":"Applications.","questions":[{"text":"How is tellurium used in solar cells, thermoelectrics, alloys and other products?","kind":"provenance"},{"text":"Which entry fits cadmium telluride?","kind":"action"}]}]},{"id":"supply","name":"Supply","description":"Supply and criticality.","findings":[{"id":"supply-finding","name":"Supply","description":"Supply.","questions":[{"text":"What are production volumes, producers and criticality assessments, with sources?","kind":"measurement"},{"text":"Which sources and years are cited?","kind":"provenance"}]}]}]},{"id":"safety","name":"Safety","description":"Handling and health.","layers":[{"id":"handling","name":"Handling","description":"Handling.","findings":[{"id":"handling-finding","name":"Handling","description":"Handling.","questions":[{"text":"What handling and exposure limits apply to tellurium and its compounds?","kind":"provenance"},{"text":"Is the question about a specific workplace, which needs its safety officer?","kind":"boundary"}]}]},{"id":"health","name":"Health","description":"Health effects.","findings":[{"id":"health-finding","name":"Health","description":"Health.","questions":[{"text":"What health effects are documented, and what do authorities advise?","kind":"provenance"},{"text":"Is the user asking about their own exposure, which needs a clinician?","kind":"boundary"}]}]}]},{"id":"context","name":"Context","description":"History and study.","layers":[{"id":"history","name":"History","description":"Discovery.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How was tellurium discovered and named?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"research","name":"Research","description":"Research.","findings":[{"id":"research-finding","name":"Research","description":"Research.","questions":[{"text":"What research involves tellurium, such as topological materials and recycling?","kind":"provenance"},{"text":"Which entry fits thermoelectric materials?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Explain tellurium's properties, sources and uses such as solar cells and alloys.","Report supply and production data from published sources."],"mustNot":["Encourage handling tellurium compounds without protective measures or ventilation.","Confuse tellurium with selenium when reporting analysis results.","Present supply forecasts as certain for a by-product metal.","Advise discarding tellurium-bearing waste outside hazardous waste rules."],"requiresHuman":["Disposing of tellurium compounds or devices containing them."]},"ethics":{"considerations":["Toxic compounds put workers and recyclers at risk.","Demand for critical metals shapes mining impacts in other countries."],"affectedParties":["Workers handling compounds","Recyclers","Communities near refineries"]},"owners":{"steward":"The person or company that holds it; workplace safety and waste authorities set the rules.","roles":[],"masterSystems":[]},"relations":[{"target":"Q104567","type":"parent","note":"registry parent class"},{"target":"metalloid","type":"related","note":"the classification"},{"target":"selenium","type":"related","note":"the neighbouring group 16 element"},{"target":"solar cell","type":"related","note":"cadmium telluride photovoltaics"},{"target":"copper refining","type":"related","note":"anode slimes"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.tellurium","Wikidata: Q1100 (https://www.wikidata.org/wiki/Q1100)","chemical symbol: Te","CAS number: 13494-80-9"]},"properties":{"applicability":"required","items":["atomic number: 52","melting point: about 450 degrees C","density: about 6.2 g per cubic centimetre","crustal abundance: about 1 part per billion - very rare"]},"recognition":{"applicability":"required","items":["Element 52, group 16 metalloid","Brittle silvery crystals","Selenium is lighter and red or grey; tellurides are compounds","Silvery-white, brittle crystalline solid, or grey-brown powder in amorphous form."]},"capabilities":{"applicability":"required","items":["explain properties and isotopes","explain uses and supply","relay safety and handling information","distinguish it from selenium and compounds"]},"hazards":{"applicability":"required","items":["Toxicity of compounds and garlic breath from low exposure","Supply constraints as a by-product metal","Confusion with selenium in analysis"]},"interfaces":{"applicability":"required","items":["Occupational exposure limits for tellurium and compounds","Chemical classification and labelling rules","Critical raw material assessments in the EU and elsewhere"]},"context":{"applicability":"required","items":["Solar cells, thermoelectrics, alloys and other industrial uses.","crystalline and amorphous tellurium","tellurium isotopes, including long-lived tellurium-128 and 130","tellurides such as cadmium telluride and bismuth telluride","tellurium in alloys and glass"]}},"sources":[{"title":"Wikidata item Q1100: tellurium","url":"https://www.wikidata.org/wiki/Q1100","note":"identity and sense of the item"},{"title":"Wikipedia: Tellurium","url":"https://en.wikipedia.org/wiki/Tellurium","note":"general description of the item"}],"openQuestions":["Should isotopes and tellurides be separate entries?","How should supply and criticality reports be linked?","The registry entry has merged isotope aliases; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q1100/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1100/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T19:51:39Z","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 2026-10-06T19:51:53+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}