Uranophane

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Uranophane

Uranophane
General
Category Uranyl neso- and polysilicates
Chemical formula Ca(UO2)2[HSiO4]2·5H2O
Strunz classification 09.AK.15
Identification
Molar mass 586.36
Color yellow
Cleavage {100} Perfect
Fracture uneven
Mohs scale hardness 2.5
Luster vitreous
Streak yellowish white
Diaphaneity Translucent to subtranslucent
Specific gravity 3.9

Uranophane Ca(UO2)2(SiO3OH)2·5H2O is a rare calcium uranium silicate hydrate mineral that forms from the oxidation of uranium bearing minerals. Uranophane is also known as uranotile. It has a yellow color and is radioactive.

Care should be taken when handling it as it flakes easily and could become embedded in the skin. Since the material is radioactive, these flakes would constantly bombard the body with ionizing radiation.

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