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 = 420 C Note: P = 101 kPa _database_code_amcsd 0017845 4.9744 8.0432 5.8300 90 90 90 Pmcn atom x y z Uiso Ca .25 .4132 .7563 .020 C .25 .7615 -.0617 .039 O1 .25 .9194 -.0837 .039 O2 .4709 .6865 -.0968 .039