Biehlite

minerals

wulfenite

anglesite

antimony

Formula: Sb3+2Mo6+O6
Oxide, antimony and molybdenum bearing mineral Hardness: 1 to 1½
Streak: White
Colour: White
Solubility: Resistant to dilute hydrochloric acid but rapidly soluble in concentrated hydrochloric acid
Environments

Hydrothermal environments

Biehlite is a very rare mineral reported only from its type locality, the Tsumeb Mine, Oshikoto Region, Namibia (as of August 2020). Here it is a secondary mineral found associated with anglesite and wulfenite on fine-grained copper ore in the oxidation zone of the mine, in a dolostone-hosted hydrothermal polymetallic ore deposit (Mindat, Webmin, AM 86.197).

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