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ATHENA

MINERALOGY

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Mineral: GONYERITE
Formula: (Mn2+,Mg)5Fe3+(Si3Fe3+)O10(OH)8
Crystal System: Orthorhombic (?)
Group: Chlorite group
IMA Number: 1955
References: AM 40 (1955), 1090; HB2/1 (1995)
Type Locality: Långban (Langban) mine, Bergslagen ore distr., Filipstad, Värmland (Wermland, Varmland), Sweden

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