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Formula: Ba(UO2)2(PO4)2.10H2O
Hydrated phosphate, uranyl- and
barium- bearing mineral,
autunite group.
Epitaxial minerals torbernite and
autunite
Crystal System: Tetragonal
Specific gravity: 3.46 measured
Hardness: 2 to 2½
Streak: Light yellow
Colour: Yellow-green, yellow; pale canary-yellow in transmitted light.
Solubility: Soluble in acids
RADIOACTIVE
Environments
Uranocircite is a secondary mineral occurring in
quartz veins with other
secondary uranium
minerals; it dehydrates rapidly to metauranocircite
(Webmin, Mindat).
At Wolsendorf, Bavaria, Germany, uranocircite occurs in a fluorite
deposit with
parsonsite
(Dana).
Uranocircite from Wolsendorf - Image
At the type locality, the Streuberg Quarry, Bergen, Vogtland, Saxony, Germany, uranocircite occurs as a
secondary mineral in
quartz veins
(Dana).
Uranocircite from the Streuberg Quarry -
Image
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