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Raman Spectrum of Violan (131)
Frequencies (cm-1) : 139, 196, 255, 323, 391, 508, 558, 666, 1011, 1110,
 CaMgSi2O6

Sample : Massive lamellar aggregate of purple manganese-bearing diopside crystals.

Silicates > Inosilicates

Pyroxene Group > Clinopyroxene Subgroup