{"snapshot":"v2026.Q2","element":{"$schemaVersion":"element-v0","recordRevision":"2026-10-13","atomicNumber":71,"symbol":"Lu","name":{"en":"Lutetium","es":null,"fr":null,"de":null,"zh":null,"pt":null,"ja":null},"cas":null,"group":null,"period":6,"block":"d","category":"lanthanide","atomicMass":{"value":174.9667,"unit":"u","uncertainty":null,"conditions":null,"sourceRef":"pubchem-periodic-table"},"density":{"value":9.84,"unit":"g/cm^3","uncertainty":null,"conditions":null,"sourceRef":"pubchem-periodic-table"},"meltingPoint":{"value":1936,"unit":"K","uncertainty":null,"conditions":null,"sourceRef":"pubchem-periodic-table"},"boilingPoint":{"value":3675,"unit":"K","uncertainty":null,"conditions":null,"sourceRef":"pubchem-periodic-table"},"electronegativity":{"value":1.27,"unit":"Pauling","uncertainty":null,"conditions":null,"sourceRef":"pubchem-periodic-table"},"ionizationEnergies":[{"value":523.5,"unit":"kJ/mol","uncertainty":null,"conditions":null,"sourceRef":"pubchem-periodic-table"}],"electronAffinity":null,"electronConfiguration":{"shorthand":"[Xe] 4f14 5d1 6s2","expanded":null,"shells":null},"termSymbol":null,"oxidationStates":{"common":[3],"all":null},"commonCompounds":null,"reactivityNotes":null,"isotopes":[{"massNumber":150,"symbol":"150Lu","mass":{"value":149.9734083125855,"unit":"u","uncertainty":0.000322,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":45,"unit":"ms","uncertainty":3},"decayModes":[{"mode":"p","branchingRatio":1,"product":null}],"spin":"(5-)","sourceRef":"nubase-2020"},{"massNumber":151,"symbol":"151Lu","mass":{"value":150.96747161369967,"unit":"u","uncertainty":0.000322,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":78.4,"unit":"ms","uncertainty":0.9},"decayModes":null,"spin":"11/2-","sourceRef":"nubase-2020"},{"massNumber":152,"symbol":"152Lu","mass":{"value":151.96412215610042,"unit":"u","uncertainty":0.000215,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":650,"unit":"ms","uncertainty":70},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"(4-","sourceRef":"nubase-2020"},{"massNumber":153,"symbol":"153Lu","mass":{"value":152.9587973773529,"unit":"u","uncertainty":0.000161,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":900,"unit":"ms","uncertainty":200},"decayModes":[{"mode":"p","branchingRatio":0,"product":null}],"spin":"11/2-","sourceRef":"nubase-2020"},{"massNumber":154,"symbol":"154Lu","mass":{"value":153.95741250546092,"unit":"u","uncertainty":0.000215,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":1,"unit":"s"},"decayModes":null,"spin":"(2-)","sourceRef":"nubase-2020"},{"massNumber":155,"symbol":"155Lu","mass":{"value":154.95432606616674,"unit":"u","uncertainty":2.04E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":68,"unit":"ms","uncertainty":2},"decayModes":[{"mode":"alpha","branchingRatio":0.9,"product":null},{"mode":"beta+","branchingRatio":0.1,"product":null}],"spin":"11/2-","sourceRef":"nubase-2020"},{"massNumber":156,"symbol":"156Lu","mass":{"value":155.95308612272856,"unit":"u","uncertainty":5.37E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":494,"unit":"ms","uncertainty":12},"decayModes":[{"mode":"alpha","branchingRatio":1,"product":null}],"spin":"(2)-","sourceRef":"nubase-2020"},{"massNumber":157,"symbol":"157Lu","mass":{"value":156.9501446118882,"unit":"u","uncertainty":1.29E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":7.7,"unit":"s","uncertainty":2},"decayModes":null,"spin":"(1/2+)","sourceRef":"nubase-2020"},{"massNumber":158,"symbol":"158Lu","mass":{"value":157.94931583584122,"unit":"u","uncertainty":1.61E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":10.6,"unit":"s","uncertainty":0.3},"decayModes":[{"mode":"beta+","branchingRatio":0.9909,"product":null},{"mode":"alpha","branchingRatio":0.0091,"product":null}],"spin":"(2)-","sourceRef":"nubase-2020"},{"massNumber":159,"symbol":"159Lu","mass":{"value":158.9466341226736,"unit":"u","uncertainty":4.29E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":12.1,"unit":"s","uncertainty":1},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"1/2+","sourceRef":"nubase-2020"},{"massNumber":160,"symbol":"160Lu","mass":{"value":159.9460329379763,"unit":"u","uncertainty":6.44E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":36.1,"unit":"s","uncertainty":0.3},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"2-","sourceRef":"nubase-2020"},{"massNumber":161,"symbol":"161Lu","mass":{"value":160.9435723748938,"unit":"u","uncertainty":3.01E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":77,"unit":"s","uncertainty":2},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"1/2+","sourceRef":"nubase-2020"},{"massNumber":162,"symbol":"162Lu","mass":{"value":161.94328466507437,"unit":"u","uncertainty":8.59E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":1.37,"unit":"min","uncertainty":0.02},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"1-","sourceRef":"nubase-2020"},{"massNumber":163,"symbol":"163Lu","mass":{"value":162.94117944508972,"unit":"u","uncertainty":3.01E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":3.97,"unit":"min","uncertainty":0.13},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"1/2+","sourceRef":"nubase-2020"},{"massNumber":164,"symbol":"164Lu","mass":{"value":163.94133940316095,"unit":"u","uncertainty":3.01E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":3.14,"unit":"min","uncertainty":0.03},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"1-","sourceRef":"nubase-2020"},{"massNumber":165,"symbol":"165Lu","mass":{"value":164.9394070237768,"unit":"u","uncertainty":2.9E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":10.74,"unit":"min","uncertainty":0.1},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"1/2+","sourceRef":"nubase-2020"},{"massNumber":166,"symbol":"166Lu","mass":{"value":165.93985898584387,"unit":"u","uncertainty":3.22E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":2.65,"unit":"min","uncertainty":0.1},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"6-","sourceRef":"nubase-2020"},{"massNumber":167,"symbol":"167Lu","mass":{"value":166.93823900779347,"unit":"u","uncertainty":4.29E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":51.5,"unit":"min","uncertainty":1},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":168,"symbol":"168Lu","mass":{"value":167.93873283808054,"unit":"u","uncertainty":4.29E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":5.5,"unit":"min","uncertainty":0.1},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"6-","sourceRef":"nubase-2020"},{"massNumber":169,"symbol":"169Lu","mass":{"value":168.93764533790488,"unit":"u","uncertainty":3.22E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":34.06,"unit":"h","uncertainty":0.05},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":170,"symbol":"170Lu","mass":{"value":169.93847948167237,"unit":"u","uncertainty":1.83E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":2.012,"unit":"d","uncertainty":0.03},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"0+","sourceRef":"nubase-2020"},{"massNumber":171,"symbol":"171Lu","mass":{"value":170.9379185548789,"unit":"u","uncertainty":2.04E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":8.247,"unit":"d","uncertainty":0.023},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":172,"symbol":"172Lu","mass":{"value":171.9390912944563,"unit":"u","uncertainty":2.47E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":6.7,"unit":"d","uncertainty":0.03},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"4-","sourceRef":"nubase-2020"},{"massNumber":173,"symbol":"173Lu","mass":{"value":172.93893573791587,"unit":"u","uncertainty":1.72E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":1.37,"unit":"y","uncertainty":0.01},"decayModes":[{"mode":"ec","branchingRatio":1,"product":null}],"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":174,"symbol":"174Lu","mass":{"value":173.94034283217078,"unit":"u","uncertainty":1.72E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":3.31,"unit":"y","uncertainty":0.05},"decayModes":[{"mode":"beta+","branchingRatio":1,"product":null}],"spin":"1-","sourceRef":"nubase-2020"},{"massNumber":175,"symbol":"175Lu","mass":{"value":174.94077718811457,"unit":"u","uncertainty":1.29E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":{"value":0.97401,"unit":"fraction","uncertainty":0.00013,"conditions":null,"sourceRef":"nubase-2020"},"halfLife":{"stable":true},"decayModes":null,"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":176,"symbol":"176Lu","mass":{"value":175.94269174666667,"unit":"u","uncertainty":1.29E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":{"value":0.02599,"unit":"fraction","uncertainty":0.00013,"conditions":null,"sourceRef":"nubase-2020"},"halfLife":{"value":37010000000,"unit":"y","uncertainty":170000000},"decayModes":[{"mode":"beta-","branchingRatio":1,"product":null},{"mode":"beta+","branchingRatio":0.0045,"product":null}],"spin":"7-","sourceRef":"nubase-2020"},{"massNumber":177,"symbol":"177Lu","mass":{"value":176.9437635730984,"unit":"u","uncertainty":1.29E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":6.6443,"unit":"d","uncertainty":0.0009},"decayModes":[{"mode":"beta-","branchingRatio":1,"product":null}],"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":178,"symbol":"178Lu","mass":{"value":177.94596004433177,"unit":"u","uncertainty":2.47E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":28.4,"unit":"min","uncertainty":0.2},"decayModes":[{"mode":"beta-","branchingRatio":1,"product":null}],"spin":"1+","sourceRef":"nubase-2020"},{"massNumber":179,"symbol":"179Lu","mass":{"value":178.94733299988422,"unit":"u","uncertainty":5.37E-06,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":4.59,"unit":"h","uncertainty":0.06},"decayModes":[{"mode":"beta-","branchingRatio":1,"product":null}],"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":180,"symbol":"180Lu","mass":{"value":179.94988696130363,"unit":"u","uncertainty":7.51E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":5.7,"unit":"min","uncertainty":0.1},"decayModes":[{"mode":"beta-","branchingRatio":1,"product":null}],"spin":"5+","sourceRef":"nubase-2020"},{"massNumber":181,"symbol":"181Lu","mass":{"value":180.951905224216,"unit":"u","uncertainty":0.00014,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":3.5,"unit":"min","uncertainty":0.3},"decayModes":[{"mode":"beta-","branchingRatio":1,"product":null}],"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":182,"symbol":"182Lu","mass":{"value":181.95515806284604,"unit":"u","uncertainty":0.000215,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":2,"unit":"min","uncertainty":0.2},"decayModes":[{"mode":"beta-","branchingRatio":1,"product":null}],"spin":"1-","sourceRef":"nubase-2020"},{"massNumber":183,"symbol":"183Lu","mass":{"value":182.9573588282558,"unit":"u","uncertainty":8.59E-05,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":58,"unit":"s","uncertainty":4},"decayModes":[{"mode":"beta-","branchingRatio":1,"product":null}],"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":184,"symbol":"184Lu","mass":{"value":183.96103034908575,"unit":"u","uncertainty":0.000215,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":20,"unit":"s","uncertainty":3},"decayModes":[{"mode":"beta-","branchingRatio":1,"product":null}],"spin":"(3+)","sourceRef":"nubase-2020"},{"massNumber":185,"symbol":"185Lu","mass":{"value":184.96354244228516,"unit":"u","uncertainty":0.000322,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":20,"unit":"s"},"decayModes":null,"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":186,"symbol":"186Lu","mass":{"value":185.96745014281763,"unit":"u","uncertainty":0.000429,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":6,"unit":"s"},"decayModes":null,"spin":null,"sourceRef":"nubase-2020"},{"massNumber":187,"symbol":"187Lu","mass":{"value":186.97018768027854,"unit":"u","uncertainty":0.000429,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":7,"unit":"s"},"decayModes":null,"spin":"7/2+","sourceRef":"nubase-2020"},{"massNumber":188,"symbol":"188Lu","mass":{"value":187.97442817948271,"unit":"u","uncertainty":0.000429,"conditions":null,"sourceRef":"ame-2020"},"abundance":null,"halfLife":{"value":1,"unit":"s"},"decayModes":null,"spin":null,"sourceRef":"nubase-2020"}],"spectroscopy":null,"discovery":{"discoverer":null,"year":1907,"location":null,"etymology":"[Pending editorial review]","namedAfter":null},"edu":{"oneLine":{"en":"[Pending editorial review]","es":null,"fr":null,"de":null,"zh":null,"pt":null,"ja":null},"paragraph":null,"misconceptions":[{"belief":"[Pending editorial review]","reality":"[Pending editorial review]","sourceRef":null}],"demos":null,"ngssTags":[],"apTags":null,"relatedElements":null},"sources":[{"id":"pubchem-periodic-table","name":"PubChem Periodic Table","url":"https://pubchem.ncbi.nlm.nih.gov/periodic-table/","edition":null,"publisher":"National Center for Biotechnology Information (NCBI), U.S. National Library of Medicine","publishedYear":null,"accessedDate":"2026-05-04","type":"secondary"},{"id":"ame-2020","name":"Atomic Mass Evaluation 2020 (AME2020)","url":"https://www-nds.iaea.org/amdc/ame2020/mass_1.mas20.txt","edition":null,"publisher":"AMDC / Chinese Physics C","publishedYear":2021,"accessedDate":"2026-10-13","type":"primary"},{"id":"nubase-2020","name":"NUBASE 2020 evaluation of nuclear properties","url":"https://www-nds.iaea.org/amdc/ame2020/nubase_1.mas20.txt","edition":null,"publisher":"AMDC / Chinese Physics C","publishedYear":2021,"accessedDate":"2026-10-13","type":"primary"}],"editorialState":"ingested"}}