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 = 70 C Note: P = 101 kPa _database_code_amcsd 0017828 4.9576 7.9835 5.7503 90 90 90 Pmcn atom x y z Uiso Ca .25 .4141 .7538 .008 C .25 .7662 -.0681 .026 O1 .25 .9187 -.0896 .026 O2 .4733 .6837 -.0983 .026