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Arsentsumebite Psm Mimetite

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CR65871

Arsentsumebite Psm Mimetite

With Antique Label

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.3 × 3 × 2.7 cm
Description

An old Freiberg Museum specimen with original old label.

Yellowgreen microcrystals of arsentsumebite psm after mimetite crystals sitting on a cluster of partely gemmy cerussite crystals.

The old label says that it is Bayldonite but XRD analyses confirm that it is arsentsumebite.

 

Mineral Data
What's on the rock

Arsentsumebite

Formula: 
Pb2Cu(AsO4)(SO4)(OH)
Strunz: 
8.BG.05
Crystal System: 
Monoclinic
Hardness: 
4.0 - 5.0
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

Mimetite

Formula: 
Pb5(AsO4)3Cl
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Treue Freundschaft Mine, Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany