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Raman Spectrum of Astrophyllite (20)
Frequencies (cm-1) : 169, 243, 256, 343, 471, 565, 656, 715, 914, 1026, 3632,
 K2NaFe7Ti2(Si4O12)2O2(OH)4F

Sample : Peralkaline nepheline syenite containing brown astrophyllite slats.

Location : Africa, Guinea, Los Archipelago,

Silicates > Inosilicates

Astrophyllite Group