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 = 258 C Note: P = 101 kPa _database_code_amcsd 0017837 4.9664 8.0126 5.7898 90 90 90 Pmcn atom x y z Uiso Ca .25 .4134 .7545 .014 C .25 .7636 -.0649 .035 O1 .25 .9190 -.0863 .035 O2 .4726 .6853 -.0983 .035