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Formula: CoAs3
Arsenide,
skutterudite subgroup,
perovskite supergroup,
cobalt-bearing mineral
Forms a series with nickelskutterudite
Crystal System: Isometric
Specific gravity: 6.5 measured, 6.821 calculated
Hardness: 5½ to 6
Streak: Black
Colour: Tin-white to silver-grey, grey
Common impurities: S,Bi,Cu,Pb,Zn,Ag,Fe,Ni
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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