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Helmutwinklerite

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SKY190777

Helmutwinklerite

Rare Mineral-Classic locality
Type Locality

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 0.9 × 0.7 cm
Description

Extremely rare yellowish aggregates of helmutwinklerite (a Pb-Zn-Cu arsenate) from the type and most important locality of the two only known localities for the species, in germanite+enargite matrix. Helmutwinklerite was labeled in Gebhard Tsumeb II book as R (rare, several occurrences with a few specimens known). The sample cames from the Freiberg University in Saxonia and has been analyzed in Russia (see a copy of the analysis in the photo). Don't miss the opportunity to get such a sought after rarity from Tsumeb !.

Mineral Data
What's on the rock

Helmutwinklerite

Formula: 
Pb(Zn,Cu)2(AsO4)2·2H2O
Strunz: 
8.CG.20
Crystal System: 
Triclinic
Hardness: 
4.5
Streak: 
White
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

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