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Formula: Ni2+Ni3+2Se4
Selenide, spinel supergroup,
nickel-bearing mineral
Crystal System: Isometric
Specific gravity: 6.62 calculated
Hardness: 2½
Colour: Creamy yellow
Environments
Metamorphic environments
Hydrothermal environments
Localities
At the Qiongmo Au-Se deposit, Zoigê county, Ngawa Autonomous Prefecture, Sichuan, China, trüstedtite occurs in
stibnite-quartz-baryte veins in schist. Associated
minerals include gold, tiemannite,
clausthalite, selenium-bearing
famatinite, selenium-bearing
gersdorffite, antimonselite,
selenium-bearing stibnite,
quartz and baryte
(HOM).
At the type locality, the Kitka River Valley, Kuusamo, North Ostrobothnia, Finland, trüstedtite occurs in
uranium-bearing calcite veins in sills of
albite dolerite in
schist, as euhedral crystals in
clausthalite, associated with
penroseite, sederholmite,
wilkmanite and kullerudite
(AM 50.520. HOM).
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