Prismatine

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Prismatine
General
Category Sorosilicate
Formula
(repeating unit)
([ ],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22
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 [1][2][3]

Prismatine is an orthorhombic-dipyramidal mineral containing aluminum, boron, fluorine, hydrogen, iron, magnesium, oxygen, and silicon. It forms a solid solution series with kornerupine.

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