Safflorite

arsenide

cobalt

Formula: CoAs2
Arsenide, löllingite group
There is a complete solid solution between safflorite and löllingite, limited solution of cobalt in rammelsbergite and no solid solution between löllingite and rammelsbergite.
Specific gravity: 7.2
Hardness: 4½ to 5
Streak: Greyish black
Colour: Tin-white, tarnishing to dark grey
Environments

Hydrothermal environments

Safflorite occurs in hydrothermal veins of moderate temperature and pressure , associated with skutterudite, rammelsbergite, nickeline, silver, bismuth and löllingite.

Common impurities: Cu,Ni,S

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