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ATHENA

MINERALOGY

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Mineral: AMMONIOALUNITE
Formula: (NH4)2Al6(SO4)4(OH)12
Crystal System: Rhombohedral (Trigonal)
Group: Alunite supergroup. Alunite group
IMA Number: 1986-037
References: AM 73 (1988), 14; HB5 (2003)
Type Locality: The Geysers, Sonoma Co., California, USA

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