Witherite 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 Note: Neutron _database_code_amcsd 0006306 5.31640 8.9056 6.43383 90 90 90 Pmcn atom x y z Uiso Ba .25 .4166 .7530 .0044 C .25 .7555 -.0817 .0083 O1 .25 .8999 -.0923 .0114 O2 .4596 .6831 -.0794 .0109