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 = 1346 K _database_code_amcsd 0003615 4.8111 4.8111 16.2511 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .83 .1387 Mg 0 0 0 .17 .1387 Mg 0 0 .5 .83 .1387 Ca 0 0 .5 .17 .1387 C 0 0 .2554 .128 O .2385 -.0344 .2410 .1386