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 = 2.95 GPa _database_code_amcsd 0008423 5.282 8.843 6.148 90 90 90 Pmcn atom x y z Uiso Ba .25 .4165 .7554 .012 C .25 .765 .904 .012 O1 .25 .904 .897 .022 O2 .459 .684 .911 .014