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Formula: NiSe
Selenide, trigonal paramorph of
hexagonal sederholmite,
nickel-bearing mineral
Crystal System: Trigonal
Specific gravity: 7.22 calculated
Hardness: 2½ to 3
Colour: Yellow
Environments
Metamorphic environments
Hydrothermal environments
Localities
At the type locality, the Kitka River Valley, Kuusamo, North Ostrobothnia, Finland, massive mäkinenite is
associated with clausthalite and
melonite in sills of albite
dolerite in schist,
associated with low-grade uranium mineralisation
(Mindat, Webmin).
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