Dolomite Antao S M, Mulder W H, Hassan I, Crichton W A, Parise J B American Mineralogist 89 (2004) 1142-1147 Cation disorder in dolomite, CaMg(CO3)2, and its influence on the aragonite+magnesite - dolomite reaction boundary Sample: P = 3 GPa, T = 1106 K _database_code_amcsd 0003607 4.7944 4.7944 16.0212 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .949 .0622 Mg 0 0 0 .051 .0622 Mg 0 0 .5 .949 .0622 Ca 0 0 .5 .051 .0622 C 0 0 .2314 .026 O .2476 -.0454 .2442 .0420