Dolomite Ross N L, Reeder R J American Mineralogist 77 (1992) 412-421 High-pressure structural study of dolomite and ankerite P = 2.90 GPa _database_code_amcsd 0001455 4.7777 4.7777 15.730 90 90 120 R-3 atom x y z Biso CaA 0 0 0 0.88 MgB 0 0 .5 0.50 C 0 0 .2426 0.68 O .2488 -.0359 .2442 0.93