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ATHENA

MINERALOGY

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Mineral:FRANCONITE
Formula:Na2Nb4O11 · 9H2O
Crystal System:Monoclinic
Strunz Nr:4/D.06-40
Group:Franconite group
References:CM 22 (1984), 239; HB3 (1997)
Type Locality:Francon quarry, St-Michel distr., Montreal Island, Québec, Canada

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