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 = 1234 K _database_code_amcsd 0003611 4.8009 4.8009 16.1069 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .917 .1181 Mg 0 0 0 .083 .1181 Mg 0 0 .5 .917 .1181 Ca 0 0 .5 .083 .1181 C 0 0 .2548 .091 O .2374 -.0422 .2396 .1005