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Piretite & Derriksite

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MNR717250

Piretite & Derriksite

Radioactive

Description Tabs

Description
Locality: 
Zálesí, Javorník, Jeseník, Olomouc Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.5 × 3 cm
Description

Yellow crystallized aggregates of this uranium selenite. Piretite is in association with massive Derriksite (green). Piretite is extremely rare mineral coming only from two localities in the world! Very few pieces were found.

Mineral Data
What's on the rock

Piretite

Formula: 
Ca(UO2)3(SeO3)2(OH)4 ·4H2O
Strunz: 
4.JJ.15
Crystal System: 
Orthorhombic
Hardness: 
2.5
Type Locality: 
Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)

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)