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Otjisumeite & Galloplumbogummite

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JYJ574476

Otjisumeite & Galloplumbogummite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.5 × 0.4 × 0.3 cm
Description

When examining the rest of my specimen I found this very fine otjisumeite. Quite a good sample for that rare mineral, with the typical pale purple colour and high luster. 

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

Galloplumbogummite

Formula: 
Pb(Ga,Al)3-xGexH1-x(PO4)2(OH)6 for 0 ≤ x ≤ 1
Hardness: 
0.0
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia
Analysis
Analysis Report - only: Otjisumeite & Galloplumbogummite