O'Danielite

arsenate

Tsumeb

Formula: H2NaZn3(AsO4)3
Arsenate, alluaudite Group
Specific gravity: >4.24
Hardness: 4
Streak: White
Colour: Pale violet
Environments

Hydrothermal environments

O'Danielite is a rare secondary arsenate.

At the type locality, the Tsumeb Mine, Oshikoto Region, Namibia, o'danielite occurs as a secondary mineral in the oxidised zone of a dolostone - hosted hydrothermal zinc-rich polymetallic ore deposit (webmin, mindat) Associated minerals include tennantite, chalcocite, cuprian adamite, stranskiite, lavendulan, k ̈ottigite, tsumcorite, koritnigite and prosperite (HOM, mindat).

Common impurities: Mg

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