Feinglosite

feinglosite

wulfenite

goethite

chalcocite

Images

Formula:Pb2Zn(AsO4)2.H2O
Arsenate, brackebuschite group

Specific gravity: 6.52 calculated
Hardness: 4 to 5
Streak: White
Colour: Pale olive green
Environments

Hydrothermal environments

Localities

At the type locality, the Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia, is a very rare secondary mineral which was found as radiating globular masses with a goethite core, in a cavity about 2cm wide in chalcocite, in an oxidized zone in a dolostone-hosted hydrothermal polymetallic ore deposit. Associated minerals include goethite, anglesite, wulfenite, chalcocite, arsendescloizite and gypsum (AM 83.653-654, Hom, Mindat).

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