AM_Ankerite_1 Formula: Ca.997 Fe.73 Mg.273 C2 O6 Name: Ankerite Unit cell: 4.8312 4.8312 16.1663 90.0 90.0 120.0 , V=326.78 Space group: R11-3 (1)

Reeder R J , Dollase W A , American Mineralogist , 74 (1989) p.1159-1167, Structural variation in the dolomite-ankerite solid-solution series: An X-ray,, Mossbauer, and TEM study, sample AMNH 8059