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Uranophane Alpha Heterogenite & Cobaltoan Calcite

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PDM882697

Uranophane Alpha Heterogenite & Cobaltoan Calcite

Description Tabs

Description
Locality: 
Kamoto East Open Cut, Kamoto, Kolwezi, Lualaba, DR Congo
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 3.8 × 3 cm
Description

Rich specimen of prismatic to acicular crystals of lustrous, canary-yellow uranophane-α, that are partially coronated or coated by spheres or crusts of black heterogenite. Some lustrous aggregates of pink cobaltoan calcite crystals are also present, adding more beauty and contrast on the yellow uranophane crystals.

Found before 1985. Ex Joseph Lhoest.

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Mineral Data
What's on the rock

Uranophane Alpha

Synonym Of: 

Uranophane

Formula: 
Ca(UO2)2[HSiO4]2·5H2O
Strunz: 
9.AK.15
Hardness: 
2.0 - 3.0

Heterogenite

Formula: 
CoO(OH)
Strunz: 
4.FE.20
Crystal System: 
Trigonal
Hardness: 
3.0 - 5.0
Type Locality: 
Wolfgang Maaßen Mine field, Schneeberg District, Erzgebirge, Saxony, Germany

Cobaltoan Calcite

Variety Of: 

Calcite

Formula: 
CaCO3
Strunz: 
5.AB.05
Hardness: 
3.0
Formula: 
(Ca,Co)CO3
Hardness: 
0.0

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