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 = 1443 K _database_code_amcsd 0003619 4.8081 4.8081 16.2756 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .613 .179 Mg 0 0 0 .387 .179 Mg 0 0 .5 .613 .179 Ca 0 0 .5 .387 .179 C 0 0 .2394 .198 O .2424 -.0483 .2463 .1630