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Chalcomenite Ahlfeldite & Mandarinoite On Krut'aite

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Chalcomenite Ahlfeldite & Mandarinoite On Krut'aite

ex coll. Prof. Wotruba, TU Aachen
Rare Mineral

Description Tabs

Description
Locality: 
El Dragón Mine, Quijarro Province, Potosi Department, Bolivia
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.7 × 5.2 × 4.2 cm
Description

A big heavy sample with very rare selenium minerals - blue chalcomenite (possibly also more greenish clinochalcomenite), brown ahlfeldite and yellow mandarinoite on massive metallic gray krutaite.
The mine was very small and is long defunct.

Mineral Data
What's on the rock

Chalcomenite

Formula: 
CuSeO3·2H2O
Strunz: 
4.JH.05
Crystal System: 
Orthorhombic
Hardness: 
2.0 - 2.5
Type Locality: 
Cerro de Cacheuta, Sierra de Cacheuta, Mendoza, Argentina

Ahlfeldite

Formula: 
(Ni,Co)SeO3·2H2O
Strunz: 
4.JH.10
Crystal System: 
Monoclinic
Hardness: 
2.0 - 2.5
Type Locality: 
Virgen de Surumi mine (Pacajake mine; Pakajake mine), Pakajake Canyon (Pacajake Canyon), Chayanta Province, Potosí Department, Bolivia

Mandarinoite

Formula: 
Fe3+2(SeO3)3·4H2O
Strunz: 
4.JH.15
Crystal System: 
Monoclinic
Hardness: 
2.5
Type Locality: 
Virgen de Surumi mine (Pacajake mine; Pakajake mine), Pakajake Canyon (Pacajake Canyon), Chayanta Province, Potosí Department, Bolivia

Krut'aite

Formula: 
CuSe2
Strunz: 
2.EB.05a
Hardness: 
4.0
Type Locality: 
Petrovice, Nové Město na Moravě, Vysočina Region, Moravia (Mähren; Maehren), Czech Republic

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