Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:FREDRIKSSONITE
Formula:Mg2(Mn3+,Fe3+)BO5
Crystal System:Orthorhombic
Strunz Nr:5/G.04-50
Group:Ludwigite Group
References:CM 32 (1994), 397; HB5 (2003)
Type Locality:Långban mine, Bergslagen ore distr., Filipstad, Värmland (Wermland), Sweden

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