Dolomite Drits V A, McCarty D K, Sakharov B, Milliken K L The Canadian Mineralogist 43 (2005) 1255-1290 New insight into structural and compositional variability in some ancient excess-Ca dolomite Sample: "Ankerite" _database_code_amcsd 0006032 4.8170 4.8170 16.0794 90 90 120 R-3 atom x y z occ Biso CaA 0 0 0 .89 MgB 0 0 .5 .67 .90 FeB 0 0 .5 .33 .90 C 0 0 .2430 O .2502 -.0329 .2442 .94