
Francevillite (Green) With Chervetite (Grey) Locality : Mounana Mine, Franceville , Haut-Ogooué, Gabon Size View 7x4.5cm — Photo: Didier Descouens · CC BY-SA 3.0
Chervetite
Chervetite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Pb₂V⁵⁺₂O₇.
It crystallizes in the monoclinic crystal system (space group P2_1/a).
Key properties: Mohs hardness 3; specific gravity 6.3–6.49; White streak; Adamantine luster; optically biaxial.
IMA symbol Crv, IMA status: approved, named in 1963.
Found in the oxidized zone of a vanadium- and lead-bearing uranium deposit (Mounana mine, Gabon).
It is found associated with Francevillite, wulfenite (Mounana mine, Gabon); mottramite, cuprite, heyite, dioptase, malachite, plancheite, vanadinite, wakefieldite-( Ce) (Kusu deposit.
The mineral was named to honor Jean Chervet, French mineralogist.