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Formula: Ni2(UO2)6(SO4)3(OH)10.16H2O
Hydrated uranyl sulphate containing hydroxyl,
zippeite group,
nickel-bearing mineral
Crystal System: Monoclinic
Specific gravity: >3.3 measured
Hardness: 5 to 5½
Colour: Tan to brownish yellow, yellow-orange
Luminescence: Fluoresces bright yellow under short wave and long wave UV
RADIOACTIVE
Environments
Sedimentary environments
Hydrothermal environments
Nickelzippeite occurs typically as secondary coatings on
mine walls, derived from oxidation of uranium-bearing primary
nickel-cobalt sulphides. Associated
minerals include cobaltzippeite,
natrozippeite, zippeite,
johannite, uranopilite,
zeunerite, schröckingerite,
bayleyite, chalcanthite,
antlerite, siderotil,
bieberite, erythrite,
epsomite, gypsum and
uraninite
(HOM).
Localities
At the type locality, Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic, nickelzippeite
occurs as very fine grained material, in crusts and coatings
(Mindat).
At the Happy Jack mine, White Canyon Mining District, San Juan County, Utah, USA, nickelzippeite is associated
with natrozippeite,
uranopilite, johannite and
zeunerite
(Dana).
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