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Bartelkeite & Galloplumbogummite

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JYJ665779

Bartelkeite & Galloplumbogummite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.8 × 0.7 × 0.4 cm
Description

Rare greenish bartelkeite on galloplumbogummite in renierite/germanite matrix. 

SEM pictures are made from this specimen. 

Mineral Data
What's on the rock

Bartelkeite

Formula: 
Pb(Fe2+Ge)[Ge2O7](OH)2·H2O
Strunz: 
9.J0.10
Crystal System: 
Monoclinic
Hardness: 
4.0
Streak: 
White
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