Strontianite Antao S M, Hassan I The Canadian Mineralogist 47 (2009) 1245-1255 The orthorhombic structure of CaCO3, SrCO3, PbCO3 and BaCO3: Linear structural trends Locality: synthetic _database_code_amcsd 0006303 5.107499 8.413820 6.026924 90 90 90 Pmcn atom x y z Uiso Sr .25 .41623 .75680 .00630 C .25 .7584 -.0861 .00931 O1 .25 .91133 -.0943 .00931 O2 .46786 .68167 -.08653 .00931