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 = 154 C Note: P = 101 kPa _database_code_amcsd 0017832 4.9614 7.9954 5.7668 90 90 90 Pmcn atom x y z Uiso Ca .25 .4139 .7539 .011 C .25 .7655 -.0671 .030 O1 .25 .9184 -.0879 .030 O2 .4731 .6844 -.0981 .030