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Formula: (U6+O2)Si7O15
Nesosilicate (insular SiO4 groups), uranyl mineral
Crystal System: Orthorhombic
Specific gravity: 3.25 calculated
Colour: Yellowish white
Very strongly RADIOACTIVE
Environments
Plutonic igneous environments
Hydrothermal environments
Localities
At the type locality, the Krunkelbach Valley Uranium deposit, Menzenschwand, St Blasien, Waldshut, Freiburg Region,
Baden-Württemberg, Germany, uranosilite occurs in intimate intergrowths with
studtite and uranophane.
Associated minerals include uranophane,
studtite, quartz and
hematite
(Mindat).
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