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 = 1205 K _database_code_amcsd 0003610 4.7985 4.7985 16.0815 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .923 .0915 Mg 0 0 0 .077 .0915 Mg 0 0 .5 .923 .0915 Ca 0 0 .5 .077 .0915 C 0 0 .2416 .121 O .2436 -.0386 .2463 .0861