AM_Ankerite_5 Formula: Ca.997 Mg.273 Fe.676 Mn.054 C2 O6 Name: Ankerite Unit cell: 4.799 4.799 15.792 90.0 90.0 120.0 , V=314.97 Space group: R11-3 (1)

Ross N L , Reeder R J , American Mineralogist , 77 (1992) p.412-421, High-pressure structural study of dolomite and ankerite, P = 4.00 GPa