AM_Calcite_1 Formula: (Ca.9 Mg.1) C O3 Name: Calcite Unit cell: 4.941 4.941 16.864 90.0 90.0 120.0 , V=356.55 Space group: R-3C (167)

Althoff P L , American Mineralogist , 62 (1977) p.772-783, Structural refinements of dolomite and a magnesian calcite and implications for, dolomite formation in the marine environment, Mg-calcite