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Bartelkeite

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JYJ949133

Bartelkeite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 1.8 × 1.8 cm
Description

Very good bartelkeite up to almost two mm length in germanite-chalcocite matrix associated with Ge rich segnitite as pseudo-cubic crystals. The brown micro-crystalline mineral is an unknown Fe3-Ge1-oxide

SEM-EDS confirmed. Analysis on request. 

Ex Armin Schöler (eshop minerals) and Joy Desor (Mineralanalytik) collection. 

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
Analysis
Analysis Report - only: Bartelkeite
Analysis Report - only: Bartelkeite