AM_Riebeckite Formula: Na2.024 K.29 Ca.014 Li.344 Mn.182 Fe4.36 Al.354 Si7.76 O22.892 F1.253 H.892 Name: Riebeckite Unit cell: 9.811 18.013 5.326 90.0 103.68 90.0 , V=914.54 Space group: C12/M1 (12)

Hawthorne F C , The Canadian Mineralogist , 16 (1978) p.187-194, The crystal chemistry of the amphiboles., VIII. The crystal structure and site chemistry of fluor-riebeckite