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Formula: Na(UO2)(SO
Hydrated uranyl sulphate
Crystal System: Monoclinic
Specific gravity: 3.726 calculated
Hardness: 2 to 3
Streak: White
Colour: Greenish yellow
Luminescence: Fluoresces bluish white under both long wave and short wave UV
Environments
Sedimentary environments
Hydrothermal environments
Plášilite is a relatively new mineral, approved in 2013.
Localities
At the type locality, the Blue Lizard Mine, Red Canyon Mining District, San Juan County, Utah, USA, plášilite
is of low-temperature secondary origin related to the
post-mining oxidation of uraninite,
pyrite, chalcopyrite,
bornite and covellite
disseminated in lenses of organic matter in sandstone. Associated
minerals include atacamite,
blödite, brochantite,
chalcanthite, dickite,
gerhardtite, gypsum,
hexahydrite, johannite,
manganoblödite,
natrozippeite and
tamarugite
(HOM).
Plášilite from the Blue Lizard Mine -
Image
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