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ATHENA

MINERALOGY

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Mineral: MICHEELSENITE
Formula: (Ca,Y)3Al(PO3OH,CO3)(CO3)(OH)6.12H2O
Crystal System: Hexagonal
Group: Ettringite group
IMA Number: 1999-033
References: NJMM (2001), 337, AM 87 (2002), 356; MR 33 (2002), 165
Type Locality: Poudrette quarry, Mont Saint-Hilaire, Rouville Co., Québec, Canada; Nanna pegmatite, Narsaarsuup Qaava, Greenland
Comments: Sulfate-free member of the ettringite group

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