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ATHENA

MINERALOGY

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Mineral: TUMCHAITE
Name: Тумчаит
Formula: Na2(Zr,Sn)Si4O11.2H2O
Crystal System: Monoclinic
IMA Number: 1999-041
References: AM 85 (2000), 1516; MR 32/5 (2001), 419
Type Locality: Vuoriyarvi (Vuorijärvi) massif, North Karelia, Murmansk region, Kola Peninsula, Russia

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