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 = 809 K _database_code_amcsd 0003601 4.7917 4.7917 15.8816 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .982 .0511 Mg 0 0 0 .018 .0511 Mg 0 0 .5 .982 .0511 Ca 0 0 .5 .018 .0511 C 0 0 .2288 .026 O .2478 -.0476 .2443 .0296