AM_Ankerite Formula: Ca1.007 Fe.542 Mg.451 C2 O6 Name: Ankerite Unit cell: 4.824 4.824 16.1217 90.0 90.0 120.0 , V=324.90 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 6376