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Derriksite & Chalcomenite

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CAM96378

Derriksite & Chalcomenite

Type Locality

Description Tabs

Description
Locality: 
Musonoi Mine, Kolwezi, Lualaba, DR Congo
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.8 × 2.5 × 2 cm
Description

Derriksite is a rare copper-uranyl-selenite named after Belgian geologist Jean Marie Francois Derriks (1912-1993). This very good sample from the Type locality has a good coverage of small green platty crystals and clusters of derriksite associated with bright blue crystals and crystalline masses of chalcomenite.

Mineral Data
What's on the rock

Derriksite

Formula: 
Cu4(UO2)(SeO3)2(OH)6·H2O
Strunz: 
4.JG.30
Hardness: 
0.0
Type Locality: 
Musonoi Mine, Kolwezi, Kolwezi District, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)

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
Cartils Minerals

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