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Formula: NiAs2
Arsenide of nickel,
löllingite group,
high-temperature paramorph of
krutovite and low-temperature
pararammelsbergite
Crystal System: Orthorhombic
Specific gravity: 7.0 to 7.2 measured, 7.091 calculated
Hardness: 5½ to 6
Streak: Greyish black
Colour: Tin white with faint pinkish hue
Luminescence: Not fluorescent in UV
Common impurities: Co,Se,S,Fe,Sb
Environments:
Rammelsbergite is an arsenic-bearing mineral which occurs in
nickel
and cobalt
veins formed at moderate temperatures, with other
nickel-cobalt
minerals
(Webmin, HOM).
Associated minerals include skutterudite,
safflorite, löllingite,
nickeline, bismuth,
silver, algodonite,
domeykite and uraninite
(HOM).
Localities
The type locality is Schneeberg, Erzgebirgskreis, Saxony, Germany.
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