Specific gravity: 5.14 calculated
Colour: Yellow, yellow brown or orange brown
Solubility: Easily soluble in 1:1 hydrochloric acid and 1:1 nitric acid
Heisenbergite is a secondary mineral formed by weathering,
that was approved in 2011
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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