Skutterudite

minerals

arsenide

nickelskutterudite

hydrothermal

Formula: CoAs3
Arsenide
Forms a series with nickelskutterudite
Specific gravity: 6.5
Hardness: 5½ to 6
Streak: Black
Colour: Tin-white to silver-grey, grey
Environments:

Hydrothermal environments

Skutterudite is a hydrothermal ore mineral, as are most primary cobalt minerals, (AM102.108-116) found in medium to high temperature veins with other nickel-cobalt minerals, associated with nickeline, cobaltite, arsenopyrite, silver, bismuth, calcite, siderite, baryte and quartz (HOM).

Localities

At Cobalt, Ontario, Canada, skutterudite pseudomorphs after silver have been found (KL p133).

At Reichelsdorf, Hessen, Germany, skutterudite occurs with erythrite (FM 47628).

Common impurities: S,Bi,Cu,Pb,Zn,Ag,Fe,Ni

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