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Formula: (UO2)(OH)2.H2O
Hydrated oxyhydroxide, uranyl mineral
Crystal System: Orthorhombic
Specific gravity: 5.14 calculated
Hardness: 2
Streak: Yellow
Colour: Yellow, yellow brown or orange brown
Solubility: Easily soluble in 1:1 hydrochloric acid and 1:1 nitric acid
Environments
Sedimentary environments
Hydrothermal environments
Heisenbergite is a secondary mineral formed by weathering,
that was approved in 2011
(HOM).
Localities
At El Sherana mine, South Alligator River, West Arnhem Region, Northern Territory, Australia, heisenbergite occurs
in a deep yellow to golden yellow incrustation on uraninite,
anglesite and dumontite. In
places, it is intimately intergrown with another yellow mineral, probably
paraschoepite
(AM 100.2007-2008).
At Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic, heisenbergite forms thick, glassy
orange-brown coatings up to 0.5 mm thick associated with uraninite,
richetite, antlerite,
zeunerite, metazeunerite,
nováčekite and langite
(AM 100.2007-2008).
At the type locality, the Krunkelbach Valley Uranium deposit, Menzenschwand, St Blasien, Waldshut, Freiburg Region,
Baden-Württemberg, Germany, heisenbergite occurs as a
secondary mineral in crusts on
baryte associated with quartz,
uraninite, billietite,
studtite, rutherfordine,
joliotite, goethite and
hematite
(AM 100.2007-2008).
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