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 = 235 C Note: P = 101 kPa _database_code_amcsd 0017836 4.9653 8.0088 5.7847 90 90 90 Pmcn atom x y z Uiso Ca .25 .4135 .7542 .013 C .25 .7642 -.0653 .034 O1 .25 .9189 -.0870 .034 O2 .4731 .6848 -.0983 .034