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ATHENA

MINERALOGY

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Mineral: THOMASCLARKITE-(Y)
Formula: Na(Y,REE)(HCO3)(OH)3.4H2O
Crystal System: Monoclinic pseudo Quadradic (Tetragonal)
IMA Number: 1997-047
References: CM 36 (1998), 1293; AM 84 (1999), 1466; MR 30 (1999), 404; HB5 (2003)
Type Locality: Alkaline pegmatite dike, Poudrette quarry, Mont Saint-Hilaire, Rouville Co., Québec, Canada

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