{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.lanthanide","code":"thing-q19569","url":"https://ver.cy/models/thing/q19569/","name":"lanthanide","alternateNames":["radiolanthanide"],"kind":"thing","status":"published","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Information and virtual systems","entryKind":"thing","plane":"INF","domain":["INF.KNW"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The series of fifteen metallic chemical elements from lanthanum to lutetium, atomic numbers 57 to 71, which together with scandium and yttrium form the rare earth elements, sharing similar chemistry because of their filling 4f electron shells; lanthanides are used in magnets, phosphors, catalysts, lasers and medical imaging, and radiolanthanides are used in nuclear medicine.","purpose":"Let an agent explain the lanthanides and their chemistry, describe their uses and supply, help identify individual lanthanides, and address environmental and geopolitical aspects with attribution.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["f-block series","Similar chemistry","Lanthanide contraction","Technology-critical"],"structure":{"bundles":[{"id":"chemistry","name":"Chemistry","description":"Properties and trends.","layers":[{"id":"trends","name":"Trends","description":"Periodic trends.","findings":[{"id":"trends-finding","name":"Trends","description":"Trends.","questions":[{"text":"Why do lanthanides have similar chemistry, and what is the lanthanide contraction?","kind":"definition"},{"text":"Which oxidation states occur?","kind":"definition"}]}]},{"id":"element","name":"Element","description":"A specific lanthanide.","findings":[{"id":"element-finding","name":"Element","description":"Specific element.","questions":[{"text":"What are the properties and uses of this particular lanthanide?","kind":"provenance"},{"text":"Which entry fits it?","kind":"action"}]}]}]},{"id":"uses","name":"Uses","description":"Applications.","layers":[{"id":"technology","name":"Technology","description":"Technology uses.","findings":[{"id":"technology-finding","name":"Technology","description":"Technology.","questions":[{"text":"How are lanthanides used in magnets, phosphors, catalysts, lasers and batteries?","kind":"provenance"},{"text":"Which are most critical for clean energy?","kind":"provenance"}]}]},{"id":"medicine","name":"Medicine","description":"Medical uses.","findings":[{"id":"medicine-finding","name":"Medicine","description":"Medicine.","questions":[{"text":"How are gadolinium contrast agents and radiolanthanides such as lutetium-177 used in medicine, in general terms?","kind":"provenance"},{"text":"Which safety considerations apply?","kind":"provenance"}]}]}]},{"id":"supply","name":"Supply","description":"Mining and separation.","layers":[{"id":"sources","name":"Sources","description":"Where they come from.","findings":[{"id":"sources-finding","name":"Sources","description":"Sources.","questions":[{"text":"Where are lanthanides mined and processed, and how concentrated is supply, according to published data?","kind":"provenance"},{"text":"How are they separated?","kind":"definition"}]}]},{"id":"policy","name":"Policy","description":"Policy and recycling.","findings":[{"id":"policy-finding","name":"Policy","description":"Policy.","questions":[{"text":"What are the documented environmental and geopolitical issues of lanthanide supply, and what recycling and substitution efforts exist?","kind":"provenance"},{"text":"Is the presentation neutral and attributed?","kind":"boundary"}]}]}]},{"id":"learn","name":"Learn","description":"Study.","layers":[{"id":"teach","name":"Teach","description":"Teaching lanthanides.","findings":[{"id":"teach-finding","name":"Teach","description":"Teaching.","questions":[{"text":"How can the lanthanides be taught with periodic table context and everyday examples?","kind":"action"},{"text":"Which misconceptions arise?","kind":"provenance"}]}]},{"id":"history","name":"History","description":"Discovery.","findings":[{"id":"history-finding","name":"History","description":"Discovery.","questions":[{"text":"How were the lanthanides discovered and separated historically?","kind":"provenance"},{"text":"Why were they called rare earths?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Report the properties, uses and supply sources of lanthanides from published scientific and trade data.","Distinguish the lanthanide series from the wider rare earth group when describing a material.","Track lanthanide content in products and waste streams for recycling it is authorized to manage."],"mustNot":["Assist in handling radiolanthanides outside a licensed facility or without radiation protection.","Present supply, price or reserve figures without their source and date.","Help evade export controls, sanctions or origin rules on rare earth trade.","Advise disposal of separation residues outside the rules for hazardous or radioactive waste."],"requiresHuman":["Administering or ordering radiolanthanide medicines or imaging agents for a patient.","Sourcing decisions that depend on conditions in mining communities."]},"ethics":{"considerations":["Mining and separation leave toxic and sometimes radioactive residues that burden local communities.","Concentrated supply makes these elements a lever of geopolitical pressure."],"affectedParties":["Mining communities","Workers in separation and recycling","Patients receiving radiolanthanides"]},"owners":{"steward":"Nobody owns the series; each producer, holder or licensed facility answers for its own material.","roles":[],"masterSystems":[]},"relations":[{"target":"Q1130479","type":"parent","note":"registry parent class"},{"target":"Q190444","type":"parent","note":"registry parent class"},{"target":"rare earth element","type":"related","note":"category"},{"target":"lithophile element","type":"related","note":"category"},{"target":"actinide","type":"related","note":"analogous series"},{"target":"periodic table","type":"related","note":"placement"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.lanthanide","Wikidata: Q19569 (https://www.wikidata.org/wiki/Q19569)"]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"optional","items":["Elements 57 to 71","4f electron filling","Actinides are the analogous 5f series","Silvery metals that tarnish in air; compounds often coloured or luminescent."]},"capabilities":{"applicability":"required","items":["explain lanthanide chemistry and trends","describe uses in technology and medicine","explain supply and recycling","identify individual elements"]},"hazards":{"applicability":"required","items":["Supply concentration and disruption","Environmental impact of mining and separation","Confusing lanthanides with all rare earths"]},"interfaces":{"applicability":"required","items":["Chemical safety data sheets","Critical raw material policies","Radiopharmaceutical regulation for radiolanthanides"]},"context":{"applicability":"required","items":["Chemistry and technology of rare earth metals.","light lanthanides","heavy lanthanides","radiolanthanides for medicine","lanthanide compounds and phosphors","rare earth elements including scandium and yttrium (related)"]}},"sources":[{"title":"Wikidata item Q19569: lanthanide","url":"https://www.wikidata.org/wiki/Q19569","note":"identity and sense of the item"},{"title":"Wikipedia: Lanthanide","url":"https://en.wikipedia.org/wiki/Lanthanide","note":"general description of the item"}],"openQuestions":["Should each lanthanide be linked to its element entry?","How should supply data be linked?","How should recycling research be linked?"],"resources":{"spec":"/models/things/publications/thing-q19569/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q19569/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T21:19:23Z","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":"not-applicable","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 2026-10-06T19:51:56+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane INF: no invented physical properties."},"score":1.0}}