Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:GONYERITE
Formula:(Mn2+,Mg)5Fe3+(Si3Fe3+)O10(OH)8
Crystal System:Orthorhombic (?)
Strunz Nr:8/H.23-80
Group:Chlorite Group
References:AM 40 (1955), 1090; HB2/1 (1995)
Type Locality:Långban mine, Bergslagen ore distr., Filipstad, Värmland (Wermland), Sweden

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