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 Locality: Coke County, Texas, USA Sample: 821-545, Phase II _database_code_amcsd 0006031 4.8215 4.8215 16.111 90 90 120 R-3 atom x y z occ Biso CaA 0 0 0 .96 MgB 0 0 .5 .86 1.25 CaB 0 0 .5 .14 1.25 C 0 0 .2426 O .2514 -.0305 .2444 1.10