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Niocalite
Type Locality
Bond zone (Quebec Columbium Ltd. and Columbium Mining Products properties), Oka complex, Oka, Deux-Montagnes RCM, Laurentides, Québec, Canada
Mineral Data
(Ca,Nb)
4
(Si
2
O
7
)(O,OH,F)
2
Strunz:
9.BE.17
Physical Properties
Hardness:
6.0
Tenacity:
brittle
