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 = 1039 K _database_code_amcsd 0003604 4.7941 4.7941 15.9868 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .975 .0612 Mg 0 0 0 .025 .0612 Mg 0 0 .5 .975 .0612 Ca 0 0 .5 .025 .0612 C 0 0 .2307 .026 O .2489 -.0477 .2440 .0398