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 = 999 K _database_code_amcsd 0003603 4.7938 4.7938 15.9652 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .965 .0591 Mg 0 0 0 .035 .0591 Mg 0 0 .5 .965 .0591 Ca 0 0 .5 .035 .0591 C 0 0 .2314 .029 O .2513 -.0452 .2440 .0377