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ATHENA

MINERALOGY

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Mineral: TOBELITE
Formula: (NH4)Al2▢AlSi3O10(OH)2
Crystal System: Monoclinic
Group: Mica group. True micas. Dioctahedral
IMA Number: 1981-021
References: MJ 11 (1982), 138; HB2/2 (1995); CM 36 (1998), 905
Type Locality: Ohgidani deposit, Tobe, Hiroshima, Japan
Comments: ▢ = vacancy

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