Fleischerite

sulphate

Tsumeb

Formula: Pb3Ge(SO4)2(OH)6.3H2O
Hydrated sulphate containing hydroxyl
Specific gravity: 4.55
Hardness: 2½ to 3
Streak: White
Colour: White to pale rose
Environments

Hydrothermal environments

Fleischerite is a very rare mineral. At the type locality, the Tsumeb mine, Namibia, it occurs in the upper oxidised portion of a dolostone-hosted hydrothermal germanium-bearing copper and arsenic-rich ore deposit (Webmin), associated with plumbojarosite, cerussite, anglesite, melanotekite, kegelite, alamosite, mimetite, itoite and altered tennantite (Dana, Mindat, HOM).

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