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ATHENA

MINERALOGY

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Mineral: DANNEMORITE = MANGANOGRUNERITE
Formula: ▢Mn2Fe2+5Si8O22(OH)2
Crystal System: Monoclinic
Group: Amphibole supergroup
References: MZ 12/4 (1990), 56; HB2/1 (1995); MM 61 (1997), 295
Comments: ▢ = vacancy

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