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About: Gagarinite-(Ce)     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Whole100003553, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: Thingdul:ChemicalObjectchemical substanceMineralmineralyago:WikicatCalciumMineralsyago:WikicatLanthanideMineralsyago:WikicatMineralsNamedAfterPeopleyago:WikicatTrigonalMineralsyago:WikicatSodiumMineralsyago:Abstraction100002137yago:CausalAgent100007347yago:LivingThing100004258yago:Material114580897yago:Matter100020827yago:Mineral114662574yago:Object100002684yago:Organism100004475yago:Part113809207yago:Person100007846yago:PhysicalEntity100001930yago:Relation100031921yago:WikicatHalideMineralsyago:YagoLegalActoryago:YagoLegalActorGeoyago:Substance100019613yago:Whole100003553 New Facet based on Instances of this Class

Gagarinite-(Ce) previously zajacite-(Ce) is a rare radioactive fluoride mineral with formula Na(REExCa1−x)(REEyCa1−y)F6. REE refers to rare-earth elements, mostly those belonging to the lanthanide series. It crystallizes in the trigonal rhombohedral system and has a white vitreous appearance with a conchoidal fracture. It has a Mohs hardness of 3.5 and a specific gravity of 4.44 to 4.55. Zajacite is transparent with refractive indices nω = 1.483 and nε = 1.503. Gagarinite-(Y) is a yttrium-rich analog.