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ATHENA

MINERALOGY

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Mineral: GEFFROYITE
Formula: (Ag,Cu,Fe)9(Se,S)8
Crystal System: Cubic
Group: Pentlandite group
IMA Number: 1980-090
References: TMPM 29 (1982), 151; HB1 (1990)
Type Locality: Chaméane, Vernet-la-Varenne, Livardois Mts, Puy-de-Dôme, France

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