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 = 1362 K _database_code_amcsd 0003616 4.8084 4.8084 16.2802 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .865 .137 Mg 0 0 0 .135 .137 Mg 0 0 .5 .865 .137 Ca 0 0 .5 .135 .137 C 0 0 .2503 .112 O .2457 -.0357 .2394 .109