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Niobokupletskite

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GMN123602

Niobokupletskite

Type Locality

Description Tabs

Description
Locality: 
Mont Saint-Hilaire, Montérégie, Québec, Canada
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.8 × 1.3 cm
Description

Very nice brown sprays of this rare mineral, with Calcioancylite Ce. (transparent prismatic crystals)
Rich old specimen , from the 1970’s.
Nowadays extremely hard to get.

Mineral Data
What's on the rock

Niobokupletskite

Formula: 
K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F)
Strunz: 
9.DC.05
Crystal System: 
Triclinic
Hardness: 
3.0 - 4.0
Type Locality: 
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

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