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From Wikipedia, the free encyclopedia
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]
| Prismatine | |
|---|---|
| |
| General | |
| Category | Sorosilicate |
| Formula (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] |
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