AM_Ferritaramite Formula: Si6.2 Al1.84 Fe3.736 Mg.885 Ti.186 Mn.185 Ca1.178 Na1.582 K.494 O24 H2 Name: Ferritaramite Unit cell: 9.923 18.134 5.352 90.0 104.84 90.0 , V=930.94 Space group: C12/M1 (12)

Hawthorne F C , Grundy H D , The Canadian Mineralogist , 16 (1978) p.53-62, The crystal chemistry of the amphiboles. VII. Crystal structure, and site chemistry of potassian ferri-taramite