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 = 92 C Note: P = 101 kPa _database_code_amcsd 0017829 4.9586 7.9867 5.7547 90 90 90 Pmcn atom x y z Uiso Ca .25 .4141 .7538 .009 C .25 .7658 -.0679 .026 O1 .25 .9183 -.0889 .026 O2 .4735 .6840 -.0983 .026