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 = 135 C Note: P = 101 kPa _database_code_amcsd 0017831 4.9605 7.9925 5.7629 90 90 90 Pmcn atom x y z Uiso Ca .25 .4139 .7538 .010 C .25 .7659 -.0670 .028 O1 .25 .9184 -.0887 .028 O2 .4730 .6841 -.0982 .028