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Kroupaite & Compreignacite

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JYJ885461

Kroupaite & Compreignacite

Description Tabs

Description
Locality: 
Giftkies Adit, Jáchymov, Krušné Hory, Karlovy Vary Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.8 × 1.5 cm
Description

Raman. SXRD & EDS no 3216-9 confirmed  orange kroupaite with yellow compreignacite. 

Comes with a colour printed analysis.  Very rare!

 

Mineral Data
What's on the rock

Kroupaite

Formula: 
KPb0.5[(UO2)8O4(OH)10]·10H2O
Crystal System: 
Orthorhombic
Type Locality: 
Svornost Mine, Joachimstal, Bohemia, Czech Republic

Compreignacite

Formula: 
K2(UO2)6O4(OH)6·7H2O
Strunz: 
4.GB.05
Crystal System: 
Orthorhombic
Hardness: 
0.0
Type Locality: 
Margnac Mine, Compreignac, Haute-Vienne, Limousin, France