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Tsumebite

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SKY645261

Tsumebite

Type Locality

Description Tabs

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

Even though tsumebite is not a very rare mineral, tsumebite from its type locality Tsumeb is a very rare mineral, since almost all tsumebite (phosphate analog) from Tsumeb are in fact arsentsumebite (arseniate analog), Chemically verified Tsumeb tsumebite is rare and most unanalyzed specimens so labeled are, most likely, arsentsumebite.  

This specimen has been analyzed by EDS and it is confirmed that is tsumebite (see copy of the analysis enclosed)

The species is labeled as RRR in Gebhard Tsumeb book (single occurrence with less than 10 specimens). Following this book (p.140), "7 samples of a total of 50 historical pieces, labelled tsumebite, were indeed tsumebite". In addition, the type specimen was destroyed by Allied bombing in 1943.

From its type locality !

Mineral Data
What's on the rock

Tsumebite

Formula: 
Pb2Cu(PO4)(SO4)(OH)
Strunz: 
8.BG.05
Hardness: 
3.5
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

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