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Formula: Fe3+5V4+3V5+12O39(OH)99.9H2O
Vanadium oxysalt
Crystal System: Monoclinic
Specific gravity: 3.4 to 3.6 measured, 3.52 calculated
Hardness: 2½
Streak: black with slight brownish tint
Colour: Black
Solubility: Soluble in cold acids. Melts at 630°C
Environments
Sedimentary environments
Hydrothermal environments
Localities
At the type locality, the Balasauskandyk V Deposit, Shieli, Kyzylorda Region, Kazakhstan, kazakhstanite forms
small (0.01 mm) round or oval grains; aggregates, and aggregates with bokite, are
up to 0.5 x 1.5 cm2 in size. Kazakhstanite occurs in thin veins or cementing
breccia in the weathering zone of
vanadium-bearing black shales;
it is associated with bokite
(Mindat, HOM).
At the Gold Quarry mine, Maggie Creek Mining Subdistrict, Carlin Trend, Eureka County, Nevada, USA, kazakhstanite
occurs in a hydrothermal gold deposit, associated with
fervanite, schubnelite,
hewettite, tyuyamunite,
cacoxenite, variscite and
fluellite
(HOM).
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