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Söhngeite & Schaurteite

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SKY627800

Söhngeite & Schaurteite

Type Locality

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 1 × 0.8 cm
Description

Beige crystals of the extremely rare gallium mineral sohngeite from the type locality in Tsumeb and only known locality worldwide.

Gallium minerals are extremely rare in Nature since only 7 from more than 5000 mineral species known are gallium minerals (source Mindat).

Associated mineral is white acicular schaurteite, a very rare germanium mineral only known at Tsumeb.

Sohngeite was labeled as RRR (extremely rare, single occurrence with less than 10 specimens known)  and schaureteite as RR (very rare, single occurrence with more than 10 specimens sknown)  in Gebhard Tsumeb book.

Analyzed specimen, see copy enclosed.

Mineral Data
What's on the rock

Söhngeite

Formula: 
Ga(OH)3
Strunz: 
4.FC.05
Hardness: 
0.0
Colour: 
Brown
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

Schaurteite

Formula: 
Ca3Ge(SO4)2(OH)6·4H2O
Strunz: 
7.DF.25
Hardness: 
2.5
Colour: 
White
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

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