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Formula: (UO2)(OH)2
Uranyl hydroxide,
schoepite group
Crystal System: Monoclinic
Specific gravity: 6.66 calculated
Colour: Canary-yellow
Luminescence: No fluorescence under UV
Environments
Sedimentary environments
Hydrothermal environments
Paulscherrerite is a dehydration product of metaschoepite. Associated minerals include
metaschoepite, uranophane-β,
weeksite and spriggite
(HOM).
Localities
At the type locality, Mount Painter No. 2 workings, Mt Painter area, Arkaroola Region, North Flinders Ranges, Flinders Ranges, South Australia,
paulscherrerite occurs as an abundant dehydration product of metaschoepite. Individual
paulscherrerite crystals are tabular, canary yellow colour and up to 500 nm in length. It has been reported as an early weathering product of
uraninite in several deposits
(AM 96.229-240).
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