Images
Formula: (UO2)(O2)(H2O)2.2H2O,
ie (U6+O2)2+(O2)2-(H2O)2.2H2O
Oxide, uranyl mineral
Crystal System: Monoclinic
Specific gravity: 3.58 measured, 3.73 calculated
Hardness: 1 to 2
Streak: Light yellow
Colour: Very pale yellow to yellow
RADIOACTIVE
Environments
Sedimentary environments
Hydrothermal environments
Studtite is a rare secondary uranium mineral in the
oxidised zone of some uranium-bearing mineral deposits; it contains a peroxide group (O2)2-
in its crystal structure, and it
may dehydrate to metastudtite (Mindat. HOM). It may form also
in spent-fission fuel elements
(Webmin).
Localities
At an Unnamed Uranium deposit, Tengchong County, Baoshan, Yunnan, China, studtite is associated with
tengchongite and calcurmolite
(HOM).
At the Krunkelbach Valley Uranium deposit, Menzenschwand, St Blasien, Waldshut, Freiburg Region, Baden-Württemberg, Germany,
studtite forms aggregates and crusts of minute needle-like crystals up to 0.5 mm in length. It is associated with
billietite, uranophane,
rutherfordine, heisenbergite,
baryte, quartz,
hematite and limonite
(AM 59.166-171, HOM).
Image
At the type locality, the Shinkolobwe mine, Shinkolobwe, Kambove District, Haut-Katanga, DR Congo, studtite is
associated with uranophane,
rutherfordine and
lepersonnite
(HOM).
Image
The photo also shows associated masuyite.
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