Kullerudite

kullerudite

wilkmanite

penroseite

marcasite

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Formula: NiSe2
Selenide of nickel, marcasite group, paramorph of penroseite
Crystal System: Orthorhombic
Specific gravity: 6.72 calculated
Hardness: 5½ to 6½
Colour: Lead grey
Common impurities: Co,Fe,Cu
Environments

Metamorphic environments

Localities

At the type locality, the Kitka River Valley, Kuusamo, North Ostrobothnia, Finland, Kullerudite occurs in sills of albite dolerite in a schist formation, associated with low-grade uranium mineralisation. It occurs almost exclusively as an alteration product of wilkmanite (AM 50.520).

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