Mineralogy Database

Osmium Mineral Data

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General Osmium Information

Help on Chemical  Formula: Chemical Formula: (Os,Ir)
Help on Composition: Composition: Molecular Weight = 190.71 gm
   Iridium  25.20 %  Ir
   Osmium   74.80 %  Os
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Os0.75Ir0.25
Help on Environment: Environment: In magmatic segregation deposits and concentrated in placers derived from ultrabasic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1804
Help on Locality: Locality: Urals Region, Sverdlovskaya Oblast', Nizhnii Tagi, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the principle element in the composition.
Help on Name Pronunciation: Name Pronunciation: Osmium Say OSMIUM
Help on Synonym: Synonym: ICSD 40323
  Iridosmine
  Nevyanakite
  PDF 41-601
  Rutheniridosmium
  Siserskite