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Francevillite Mounanaite & Curetonite

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SCH48055

Francevillite Mounanaite & Curetonite

Type Locality

Description Tabs

Description
Locality: 
Mounana Mine, Franceville, Haut-Ogooué Province, Gabon
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 1.6 × 1.9 cm
Description

Lustrous, bright orange isolated spherical groups of tabular francevillite on dark brown mounanaite crystals. 

Powdery microcrystals of yellow curietonite are present.

Not only rare, but very aesthetic.

Mineral Data
What's on the rock

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

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

Curetonite

Formula: 
Ba4Al3Ti(PO4)4(O,OH)6
Strunz: 
8.BK.15
Hardness: 
3.5
Streak: 
White
Type Locality: 
Redhouse Barite Mine, Potosi District, Osgood Mts, Humboldt Co., Nevada, USA
schani

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