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ATHENA

MINERALOGY

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Mineral: STEEDEITE
Formula: NaMn2[Si3BO9](OH)2
Crystal System: Anorthic (Triclinic)
IMA Number: 2013-052
References: MM 77/7 (2013), 3002; CM 52/1 (2014), 47
Type Locality: Poudrette quarry, Mont Saint-Hilaire, Rouville, Québec, Canada

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