www.mindat.org/min-1603.htmlFredrikssonite: Burns P C, Cooper M A, Hawthorne F C (1994) Jahn-Teller-distorted MnO6 octahedra in fredrikssonite, the fourth polymorph of Mg2Mn(BO3)O2 The Canadian Mineralogist 32 397-403: 1994: 0: 293
www.yourdictionary.com/fredrikssonitefredrikssonite definition: Noun 1. (mineralogy) An orthorhombic-dipyramidal reddish brown mineral containing boron, iron, magnesium, manganese, and oxygen.Origin Fredriksson + -ite...
www.dakotamatrix.com/products/9597/fredrikssoniteFredrikssonite - Blackish thin, long prismatic crystals suspended in matrix. Filipstad is the only locality for this minerals. . This and many more mineral specimens are available for sale at Dakota Matrix Minerals.
www.dakotamatrix.com/products/18390/fredrikssoniteFredrikssonite - Black acicular crystals to 4mm embedded in matrix. Rich. . This and many more mineral specimens are available for sale at Dakota Matrix Minerals.
www.handbookofmineralogy.com/pdfs/fredrikssonite.pdfFredrikssonite Mg2(Mn3+,Fe3+)BO5 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic. Point Group: 2/m 2/m 2/m. As crystals, prismatic and striated along , sharp to rounded, to 2.0 mm, with diamond-shaped cross-sections; in parallel
en.wikipedia.org/wiki/Borate_mineralThe borate minerals are minerals which contain a borate anion group. The borate (BO 3) units may be polymerised similar to the SiO 4 unit of the silicate mineral class. This results in B 2 O 5, B 3 O 6, B 2 O 4 anions as well as more complex structures which include hydroxide or halogen anions. The [B(O,OH) 4] − anion exists as well. Many borate minerals, such as borax, colemanite, and ...
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