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 = 1400 K _database_code_amcsd 0003618 4.8089 4.8089 16.2901 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .772 .1204 Mg 0 0 0 .228 .1204 Mg 0 0 .5 .772 .1204 Ca 0 0 .5 .228 .1204 C 0 0 .2418 .207 O .2533 -.0347 .2439 .1618