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Formula: RhAs
Arsenide of rhodium
Specific gravity: 9.72 calculated
Hardness: 6
Streak: Greyish black
Colour: Grey-white
Common impurities: Ru,Pt,Ni
Environments
Plutonic igneous environments
Placer deposits
Localities
At the Upper Miass River, Chelyabinsk Oblast, Russia, cherepanovite is associated with
isoferroplatinum, rhodium-bearing
irarsite, hongshiite,
sperrylite and tulameenite
(HOM).
At the type locality, Placer deposit, Northern Pekul'ney River, Pekul'ney Range, Chukotka Autonomous Okrug, Russia,
cherepanovite is associated with intergrown (platinum,
ruthenium, iridium,
osmium) solid solutions,
rutheniridosmine, laurite,
irarsite, cooperite and unnamed RhNiAs. The
cherepanovite occurs as individual grains (up to 20 microns) or their aggregates (up to 100 microns) included in
ferronickelplatinum or among aggregates of
cooperite, in alluvial deposits derived from
ultrabasic rocks of the ophiolitic zone
(AM 71.1544).
Other associated minerals include isoferroplatinum,
tetraferroplatinum, sperrylite,
hollingworthite, chromite and
olivine
(HOM).
At the Rai-Iz Ophiolite Massif, Tyumen Oblast, Russia, cherepanovite is associated with
laurite, erlichmanite,
cuproiridsite, kashinite,
rhodian pentlandite, irarsite,
chromite and olivine
(HOM).
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