Prismatine
(repeating unit)([ ],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 IMA symbol Prm[1] Strunz classification 9.BJ.50 Crystal system Orthorhombic Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m) Space group Cmcm Identification Color Yellow brown, green brown, brown green Specific gravity 3.34 Optical properties Biaxial (-) References [2][3][4]
H-M symbol: (2/m 2/m 2/m)
Prismatine is an orthorhombic-dipyramidal mineral containing aluminium, boron, fluorine, hydrogen, iron, magnesium, oxygen, and silicon. It forms a solid solution series with kornerupine.[4]
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