Witherite Holl C M, Smyth J R, Laustsen H M S, Jacobsen S D, Downs R T Physics and Chemistry of Minerals 27 (2000) 467-473 Compression of witherite to 8 GPa and the crystal structure of BaCO3 II Sample: P = 4.56 GPa _database_code_amcsd 0008425 5.269 8.838 5.999 90 90 90 Pmcn atom x y z Uiso Ba .25 .4165 .7562 .011 C .25 .756 .906 .016 O1 .25 .905 .891 .011 O2 .460 .680 .908 .009