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ATHENA

MINERALOGY

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Mineral: JACOBSITE
Formula: (Mn2+,Fe2+,Mg)(Fe3+,Mn3+)2O4
Crystal System: Cubic
Group: Spinel supergroup. Oxyspinel group. Spinel subgroup
IMA Number: 1982 s.p.
References: DAN Earth Sci. 314 (1990), 174; HB3 (1997)
Type Locality: Jakobsberg mine, Nordmark, Filipstad, Värmland (Varmland, Wermland), Sweden

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