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Formula: CuSeO3.2H2O
Selenite, monoclinic paramorph of
orthorhombic
chalcomenite
Crystal System: Monoclinic
Specific gravity: 3.28
Hardness: 2
Streak: Pale green
Colour: Bluish green
Environments
Localities
At El Dragón mine, Antonio Quijarro Province, Potosí, Bolivia, clinochalcomenite occurs in a hydrothermal
selenium vein deposit, associated with
chalcomenite, cobaltomenite and
alunite
(HOM).
Clinochalcomenite was originally reported from an undisclosed locality in Gansu Province, China. It occurred as
a very rare secondary mineral in the oxidised zone of a
uranium deposit in brecciated carbonaceous
slate, closely associated with
volborthite, chalcomenite,
umangite and malachite
(AM 66.217).
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