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Raman Spectrum of Grunerite (77)
Frequencies (cm-1) : 152, 180, 214, 346, 397, 528, 658, 963, 1008, 1097, 3618, 3636,
 Fe7Si8O22(OH)2

Location : Europe, France, Massif des Maures,

Silicates > Inosilicates

Amphibole Group > Magnesium-iron-manganese Amphibole Subgroup

Raman Spectrum of Grunerite (78)
Frequencies (cm-1) : 150, 180, 346, 399, 528, 656, 960, 1015, 3618, 3636,
 Fe7Si8O22(OH)2

Location : Europe, France, Massif des Maures,

Silicates > Inosilicates

Amphibole Group > Magnesium-iron-manganese Amphibole Subgroup