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ATHENA

MINERALOGY

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Mineral: NIOCALITE
Formula: Ca7Nb(Si2O7)2O3F
Crystal System: Monoclinic
Group: Wöhlerite group
IMA Number: 1956
References: CM 6 (1958), 264; HB2/2 (1995); MM 86 (2022), 661
Type Locality: Bond zone, Oka, Deux-Montagnes Co., Québec, Canada

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