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Formula: Pd(Te,Bi)2-x (x ≈ 0.4)
Telluride/Bismuthide,
nickeline group, forms a series with
sobolevskite and sudburyite,
palladium-bearing mineral
Specific gravity: 8.26
Hardness: 4 to 4½
Colour: Grey, steel-grey
Common impurities: Pt
Environments
Kotulskite is a minor accessory mineral, of primary or
secondary hydrothermal origin, in many
platinum-palladium bearing
copper-nickel deposits in
ultramafic
rocks. Associated minerals include sobolevskite, merenskyite,
melonite, michenerite,
moncheite, braggite,
chalcopyrite, bornite,
pentlandite, pyrrhotite and
pyrite
(HOM)
Localities
At the type locality, the Monchegorsk Cu-Ni Deposit, Monchegorsk, Murmansk Oblast, Russia, kotulskite occurs as grains in
chalcopyrite veins cutting magnetite, often intergrown
with moncheite and michenerite
(AM 48.1181, Webmin).
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