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Formula: OsAs2
Arsenide of osmium,
löllingite group, forms a series with
anduoite
Specific gravity: 11.20 calculated
Hardness: 7
Colour: Dull steel-grey
Solubility: Insoluble in hydrochloric and nitric acids, and dissolves with difficulty in aqua regia
Common impurities: Ir,Ni,Fe,Co
Environments
Metamorphic environments
Hydrothermal environments
Localities
The type locality, the Yangliuping Cu-Ni-PGE deposit, Yangliuping Cu-Ni-PGE ore field, Danba county, Garzê Autonomous
Prefecture, Sichuan, China, is associated with an altered ultramafic body.
Omeiite occurs here associated with pyrrhotite,
pentlandite, chalcopyrite,
violarite, cubanite,
bornite, sphalerite,
galena, linnaeite,
magnetite,
testibiopalladite,
sudburyite, michenerite,
sperrylite, kotulskite,
gold and electrum
(HOM).
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