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www.mineralgallery.co.za Minerals U-Z |
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Name
Uranophane
Chemistry
Ca(UO2)2Si2O7.6H2O
Uses
As mineral specimens and as an ore of uranium
Color
Various hues of yellow and brown
Hardness
2.5
Specific gravity
3.9
Crystals
Radial, acicular aggregates, thin coatings, granular and also massive
Accompanied by:
Other uranium minerals
Fracture
Uneven
Luster
Vitreous to dull
Cleavage
Good on (100)
Streak
Yellow-green
Similar to:
Boltwoodite
It forms as a secondary mineral in the oxidation zone of uranium deposits as a product of uraninite alteration, It is associated with autenite, torbernite and other secondary uranium hydroxides. Crystals up to 10 mm long occur in Shinkolobwe Kasolo, DRC and Mounana, Gabon. Fine crystals also came from the Rossing mine in Namibia.