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ATHENA

MINERALOGY

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Mineral:CUMMINGTONITE
Formula:[]Mg7Si8O22(OH)2
Crystal System:Monoclinic
Strunz Nr:8/F.07-20
Group:Amphibole group group I: Mg. Fe, Mn, Li
References:AM 74 (1989), 1091; HB2/1 (1995); MM 61 (1997), 295
Type Locality:Cummington, Hampshire Co., Massachusetts, USA
Comments:[] = vacancy

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