Stranskiite

arsenate

Tsumeb

Formula: CuZn2(AsO4)2
Anhydrous normal arsenate
Specific gravity: 5.23 to 5.3
Hardness: 4
Colour: Cyan blue
Environments

Hydrothermal environments

Stranskiite is a very rare secondary arsenate.

At the type locality, the Tsumeb Mine, Oshikoto Region, Namibia, stranskiite occurs as a secondary mineral in the oxidation zone of a dolostone hosted hydrothermal polymetallic ore deposit (Webmin, Mindat, HOM). Associated minerals include chalcocite, tennantite, galena, schultenite, anglesite, bayldonite, cuprian adamite, keyite, olivenite, claudetite, ludlockite, tsumcorite, koritnigite, warikahnite, duftite, carminite, beudantite, scorodite, o’danielite, zincroselite, claraite and leiteite (HOM, Dana).

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