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 = 1142 K _database_code_amcsd 0003608 4.7956 4.7956 16.0405 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .938 .0602 Mg 0 0 0 .062 .0602 Mg 0 0 .5 .938 .0602 Ca 0 0 .5 .062 .0602 C 0 0 .2410 .067 O .2498 -.0367 .2457 .0567