Cuprorhodsite

cuprorhodsite

cuproiridsite

isoferroplatinum

osmium

Images

Formula: (Cu¹⁺_0.5Fe³⁺_0.5)Rh³⁺₂S₄
Sulphide, linnaeite subgroup, thiospinel group, spinel supergroup, forms a series with cuproiridsite
Crystal System: Isometric
Specific gravity: 5.88 calculated
Hardness: 5 to 5½
Colour: Iron-black
Environments

Placer deposits

Localities

There are two co-type localities, Mount Filipp, Kamchatka Krai, and the Chad Massif, Ayan-Maya district, Khabarovsk Krai, both in Russia. Here cuprorhodsite occurs as small inclusions in angular isoferroplatinum host grains that are, in turn, the result of platinum mineralisation within alluvial deposits. Other associated mineral inclusions are cuproiridsite, malanite, native osmium, osmium variety iridosmine, laurite, erlichmanite, cooperite, sperrylite, chalcopyrite and bornite (AM 71.1277).

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