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About: Omphacite     Goto   Sponge   NotDistinct   Permalink

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

Type: Thingpersondul:ChemicalObjectchemical substanceMineralmineralyago:WikicatCalciumMineralsyago:WikicatMagnesiumMineralsyago:WikicatMonoclinicMineralsyago:WikicatSilicateMineralsyago:WikicatSodiumMineralsyago:Abstraction100002137yago:Material114580897yago:Matter100020827yago:Mineral114662574yago:Part113809207yago:PhysicalEntity100001930yago:Relation100031921yago:WikicatIronMineralsyago:Substance100019613yago:WikicatAluminiumMinerals New Facet based on Instances of this Class

Omphacite is a member of the clinopyroxene group of silicate minerals with formula: (Ca, Na)(Mg, Fe2+, Al)Si2O6. It is a variably deep to pale green or nearly colorless variety of clinopyroxene. It normally appears in eclogite, which is the high-pressure metamorphic rock of basalt. Omphacite is the solid solution of Fe-bearing diopside and jadeite. It crystallizes in the monoclinic system with prismatic, typically twinned forms, though usually anhedral. Its space group can be P2/n or C2/c depending on the thermal history. It exhibits the typical near 90° pyroxene cleavage. It is brittle with specific gravity of 3.29 to 3.39 and a Mohs hardness of 5 to 6.