Specific gravity: 4.87
Colour: Reddish grey
Ottemannite occurs in zones of oxidation or secondary
enrichment in hydrothermal tin deposits. Associated minerals include
herzenbergite and berndtite
At the type locality, Cerro de Potosí, Potosí City, Potosí, Bolivia, Ottemannite occurs as small laths, commonly twinned, replacing stannite and replaced by cassiterite (AM 50.2107). Other associated minerals include herzenbergite and berndtite (Mindat).
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