Images
Formula: Al0.6(V5+,V4+)8O20.9H2O
Hydrated vanadate,
straczekite group
Crystal System: Monoclinic
Specific gravity: 2.7 measured, 2.50 calculated
Colour: Black to dark green
Environments
Sedimentary environments
Hydrothermal environments
Localities
At the type locality, the Mounana Mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon,
bariandite occurs in fibres up to 3 mm long, platy on a perfect cleavage plane and nearly opaque. It occurs
in the oxidation zone of the uranium deposit, associated with
duttonite and lenoblite
(AM 57.1555).
Bariandite from the Mounana Mine -
Image
At the Ragra Mine, Huayllay District, Pasco Province, Pasco, Peru, bariandite occurs in the oxidation zone
of the vanadium deposit, associated with
roscoelite and gypsum
(HOM).
Bariandite from the Ragra Mine -
Image
Back to Minerals