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Formula: Pb2V5+2O7
Anhydrous normal vanadate
Crystal System: Monoclinic
Specific gravity: 6.30 to 6.49 measured, 6.38 calculated
Hardness: 2 to 2½
Streak: White
Colour: Grey to brown
Environments
Sedimentary environments
Hydrothermal environments
Localities
At the Kusu vanadium deposit, Kongo Central, DR Congo, chervetite is associated with
mottramite, cuprite,
heyite, dioptase,
malachite, plancheite,
vanadinite and
wakefieldite-(Ce)
(HOM).
At the type locality, the Mounana mine, Mounana, Léboumbi-Leyou Department, Haut-Ogooué Province, Gabon,
chervetite occurs associated with francevillite and more
rarely with wulfenite in the zone of oxidation. It is found as nearly
colourless crystals from less than one mm to several cm and always twinned; also as
pseudomorphs after
francevillite
(AM 48.1413-1421).
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