Aragonite Antao S M, Hassan I The Canadian Mineralogist 48 (2010) 1225-1236 Temperature dependence of the structural parameters in the transformation of aragonite to calcite, as determined from in situ synchrotron powder X-ray-diffraction data Locality: Cuenca, Spain Note: T = 175 C Note: P = 101 kPa _database_code_amcsd 0017833 4.9624 7.9989 5.7714 90 90 90 Pmcn atom x y z Uiso Ca .25 .4139 .7538 .012 C .25 .7645 -.0668 .031 O1 .25 .9179 -.0884 .031 O2 .4738 .6843 -.0981 .031