Parauranophane

parauranophane

uranophane

uraninite

liebigite

Images

Formula: Ca(U⁶⁺O₂)₂(SiO₃OH)₂.5H₂O
Nesosilicate (insular SiO₄ groups), uranyl mineral, uranophane group, paramorph of uranophane
Crystal System: Monocclinic
Specific gravity: 3.90 to 3.95 measured
Hardness: 2½ to 3
Colour: Yellowish green, yellow, brownish yellow
Luminescence: Fluoresces faint green under UV
RADIOACTIVE
Environments

Hydrothermal environments

Parauranophane is a secondary mineral, altering from other uranium minerals under oxidising conditions. Associated minerals include uraninite and uranophane (HOM).

Localities

At the type locality, Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic, parauranophane is associated with liebigite (Mindat).

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