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 = 3.94 GPa _database_code_amcsd 0008424 5.274 8.838 6.060 90 90 90 Pmcn atom x y z Uiso Ba .25 .4165 .7559 .011 C .25 .752 .905 .017 O1 .25 .901 .894 .014 O2 .461 .678 .910 .012