Skutterudite

skutterudite

cobaltite

erythrite

nickeline

Images

Formula: CoAs3
Arsenide, cobalt-bearing mineral
Forms a series with nickelskutterudite
Specific gravity: 6.5
Hardness: 5½ to 6
Streak: Black
Colour: Tin-white to silver-grey, grey
Common impurities: S,Bi,Cu,Pb,Zn,Ag,Fe,Ni
Environments:

Hydrothermal environments

Skutterudite is an arsenic-bearing hydrothermal ore mineral (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).

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