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Formula: NiSbSe
Selenide, nickel- and
antimony- bearing mineral
Crystal System: Isometric
Specific gravity: 7.607 calculated
Hardness: 5 to 6
Streak: Grey
Colour: Grey
Environments
Kvačekite is a new mineral, approved in 2024 and to date (October 2024) reported only from the type
locality.
Localities
At the type locality, the Bukov Mine, Rožná deposit, Rožná, Žďár nad Sázavou District, Vysočina Region, Czech
Republic, the uranium ore district is an example of shear-zone hosted
hydrothermal mineralisation. Kvačekite occurs as anhedral grains, up to 15 μm in size, associated with
nickeltyrrellite,
tyrrellite, berzelianite,
hakite-(Zn), hakite-(Cd),
eucairite, clausthalite,
gold and calcite
(Mindat).
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