Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:GJERDINGENITE-Mn
Formula:(K,Na)2(Mn2+,Fe2+)(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O
Crystal System:Monoclinic pseudo Orthorhombic
Strunz Nr:8/E.07-80
Group:Labuntsovite Group
References:EJM 16 (2004), 979
Type Locality:Gjerdingselva, Lunner, Oppland, Oslo Region, Norway

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