Zincroselite

arsenate

Tsumeb

Formula: Ca2Zn(AsO4)2.2H2O
Hydrated normal arsenate, roselite group, dimorphous with gaitite.
Specific gravity: 3.75
Hardness: 3
Streak: White
Colour: Colourless, white
Environments

Hydrothemal environments

At the type locality, the Tsumeb Mine, Oshikoto Region, Namibia, zincroselite was found as a rare secondary mineral in a small cavity in an oxidised zone of a dolostone-hosted hydrothermal polymetallic ore deposit (WebMin, Dana, HOM). Associated minerals included tsumcorite, stranskiite, leiteite, quartz and tennantite (HOM, MinRec 38.5).

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