Formula: Pb3GeO2(SO4)2(OH)2
Anhydrous sulphate containing hydroxyl
Specific gravity: 6.67
Streak: White
Colour: White

Hydrothermal environments

Itoite is a very rare mineral that occurs at the type locality, the Tsumeb Mine, Oshikoto Region, Namibia, in the upper oxidation zone of a germanium-bearing copper and arsenic-rich polymetallic ore deposit, as fine-grained pseudomorphs after fleischerite, associated with cerussite, mimetite and altered tennantite, and also as a crust on plumbojarosite and mimetite on dolomite (AM 45.1313, Mindat, HOM).

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