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Gerdtremmelite

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SKY627725

Gerdtremmelite

Type Locality

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.3 × 0.2 × 0.1 cm
Description

Extremely rare mineral from Tsumeb! The mineral, that is only known from this locality worldwide, was labeled as "RRR: extremely rare: single occurrence with less than 10 specimens known" and "brown aggregates of minute crystals on the type specimen" in G.Gebhard Tsumeb II book (1999) when the mine was already closed (1996), so new discoveries will not take place in the future .

It occurs in this specimen as two typical brown balls, associated to minoritary scorodite.

This sample was in Gebhard collection and it's part of the type specimen, as proved by the label enclosed. Second oxidation zone.

Mineral Data
What's on the rock

Gerdtremmelite

Formula: 
(Zn,Fe)(Al,Fe)2(AsO4)(OH)5
Strunz: 
8.BE.40
Hardness: 
0.0
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

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