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Otjisumeite

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SKY672850

Otjisumeite

Type Locality

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.4 × 0.4 × 0.3 cm
Description

White prismatic crystals of the extremely rare germanium mineral otjisumeite, from the only known locality worldwide.

Otjisumeite was labeled as RRR in Tsumeb II Gebhard book (Extremely rare, single occurrence with less than 10 specimens known). In fact, when this book was published (1999), only 2 specimens were known worldwide (p.275).

Only 33 of almost 5500 minerals known are germanium minerals, so it is a real rarity (source MINDAT)!.

Analyzed specimen (see copy of the analysis attached).

Mineral Data
What's on the rock

Otjisumeite

Formula: 
PbGe4O9
Strunz: 
9.J0.15
Hardness: 
3.0
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

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Start 12 Sep 18:00
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