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ATHENA

MINERALOGY

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Mineral:MINAMIITE = NATROALUNITE-2R
Formula:(Na,Ca,K)2Al6(SO4)4(OH)12
Crystal System:Rhomboedral (Trigonal)
Group:Alunite-Jarosite group Alunite subgroup
References:AM 67 (1982), 114; HB5 (2003); L 11 (2009), 40
Type Locality:Monzo Hot Springs, Kusatsu-Shrane volcano, Okumanza, Gumma pref., Japan

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