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 = 1292 K _database_code_amcsd 0003613 4.8035 4.8035 16.1468 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .878 .1483 Mg 0 0 0 .122 .1483 Mg 0 0 .5 .878 .1483 Ca 0 0 .5 .122 .1483 C 0 0 .2564 .104 O .2365 -.0396 .2402 .1329