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Formula: (UO2)2(C2O4)(OH)2(H2O)2
Organic compound, oxalate, uranyl mineral
Crystal system: Triclinic
Specific gravity: 4.403 calculated
Hardness: 2
Streak: Very pale yellow
Colour: Light yellow
Luminescence: Weak green-grey fluorescence under 405 nm laser illumination
Solubility: Insoluble in water and slowly soluble in dilute hydrochloric acid
RADIOACTIVE
Environments
Sedimentary environments
Hydrothermal environments
Metauroxite is a relatively new mineral, approved in 2019.
Localities
At the Type Locality, the Burro Mine, San Miguel County, Colorado, USA, metauroxite is a post-mining
secondary phase found in efflorescent crusts on mine walls
on bitumen-quartz matrix
in uranium-vanadium deposits in
sandstone. Oxalate, (C2O4)2-,
likely derived from the asphaltite matrix (probably fossilised
wood) and the uranyl, (UO2)2+, from
primary (especially
uraninite) and/or
secondary
uranium-bearing minerals. Associated minerals include
uroxite, abernathyite,
gypsum, tyuyamunite
and uranopilite
(HOM).
Metauroxite from the Burro Mine -
Image
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