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 = 1466 K _database_code_amcsd 0003620 4.8072 4.8072 16.3354 90 90 120 R-3 atom x y z occ Uiso Ca 0 0 0 .562 .278 Mg 0 0 0 .438 .278 Mg 0 0 .5 .562 .278 Ca 0 0 .5 .438 .278 C 0 0 .246 .374 O .2384 -.0290 .2482 .246