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About: Neptunite     Goto   Sponge   NotDistinct   Permalink

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

Type: Thingdul:ChemicalObjectchemical substanceMineralmineralyago:WikicatLithiumMineralsyago:WikicatMagnesiumMineralsyago:WikicatManganeseMineralsyago:WikicatMineralsyago:WikicatMonoclinicMineralsyago:WikicatTitaniumMineralsyago:WikicatSilicateMineralsyago:WikicatSilicatesyago:WikicatSodiumMineralsyago:Abstraction100002137yago:Chemical114806838yago:Compound114818238yago:Material114580897yago:Matter100020827yago:Mineral114662574yago:Part113809207yago:PhysicalEntity100001930yago:Relation100031921yago:WikicatIronMineralsyago:Salt115010703yago:Silicate115040033yago:Substance100019613yago:WikicatPotassiumMinerals New Facet based on Instances of this Class

Neptunite is a silicate mineral with the formula KNa2Li(Fe2+, Mn2+)2Ti2Si8O24. With increasing manganese it forms a series with mangan-neptunite. Watatsumiite is the variety with vanadium replacing the titanium in the formula. It was first described in 1893 for an occurrence in the Narssârssuk pegmatite of West Greenland. It is also found within natrolite veins in glaucophane schist within serpentinite in San Benito County, California, US. It also occurs in Mont Saint-Hilaire, Quebec and in the Kola Peninsula of Russia.