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Mounanaite Francevillite & Chervetite

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CAM121821

Mounanaite Francevillite & Chervetite

Type Locality

Description Tabs

Description
Locality: 
Mounana Mine, Franceville, Haut-Ogooué Province, Gabon
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 1 × 2 cm
Description

This is a small but very fine sample. The matrix has a good coverage of bright green crystals of francevillite, a rare barium-lead-uranyl-vanadate named after the Type Locality Franceville. The francevillite is associated with small greyish to colourless chervetite crystals, a very rare lead-vanadate named after French mineralogist Jean Chervet. The third species on this specimen is a reddish brown crystalline crust of mounanaite, a very rare lead-iron-vanadate. The Mounana Mine is the Type Locality for all three species.

Mineral Data
What's on the rock

Mounanaite

Formula: 
PbFe3+2(VO4)2(OH,F)2
Strunz: 
8.CG.15
Crystal System: 
Triclinic
Hardness: 
0.0
Type Locality: 
Mounana Mine (Mouana Mine), Franceville, Haut-Ogooué Province, Gabon

Francevillite

Formula: 
(Ba,Pb)(UO2)2(VO4)2·5H2O
Strunz: 
4.HB.15
Hardness: 
3.0
Type Locality: 
Mounana Mine (Mouana Mine), Franceville, Haut-Ogooué Province, Gabon

Chervetite

Formula: 
Pb2(V2O7)
Strunz: 
8.FA.15
Hardness: 
2.0 - 2.5
Type Locality: 
Mounana Mine (Mouana Mine), Franceville, Haut-Ogooué Province, Gabon
Cartils Minerals

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