AM_Ferriwhittakerite Formula: Na2.411 K.232 Mg1.47 Fe2.06 Zn.4 Al.1 Ti.12 Li1.35 Mn.12 Ca.11 H1.3 Si8 O23.3 F.7 Name: Ferriwhittakerite Unit cell: 9.712 17.851 5.297 90.0 103.63 90.0 , V=892.47 Space group: C12/M1 (12)

Oberti R , Camara F , Caballero J M , American Mineralogist , 89 (2004) p.888-893, Ferri-ottoliniite and ferriwhittakerite, two new end-members of the new, Group 5 for monoclinic amphiboles