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Torbernite & Coffinite

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HCH104089

Torbernite & Coffinite

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Description
Locality: 
Christa Mine, Großschloppen, Kirchenlamitz, Upper Franconia, Bavaria, Germany
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.5 × 1 cm
Largest Crystal: 
0.10cm
Description

Green platy torbernite rich with some black aggregates of coffinite on granite.

Mineral Data
What's on the rock

Torbernite

Formula: 
Cu(UO2)2(PO4)2·12H2O
Strunz: 
8.EB.05
Crystal System: 
Tetragonal
Hardness: 
2.0 - 2.5
Type Locality: 
Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany

Coffinite

Formula: 
(U4+,Th)(SiO4)1-x(OH)4x
Strunz: 
9.AD.30
Hardness: 
5.0 - 6.0
Type Locality: 
La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA

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