Dolomite Ross N L, Reeder R J American Mineralogist 77 (1992) 412-421 High-pressure structural study of dolomite and ankerite P = 4.69 GPa _database_code_amcsd 0001457 4.7636 4.7636 15.582 90 90 120 R-3 atom x y z Biso CaA 0 0 0 0.76 MgB 0 0 .5 0.46 C 0 0 .2439 0.65 O .2496 -.0359 .2443 0.82