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 = 6.20 GPa _database_code_amcsd 0008427 5.255 8.852 5.838 90 90 90 Pmcn atom x y z Uiso Ba .25 .4165 .7560 .010 C .25 .762 .895 .021 O1 .25 .901 .883 .011 O2 .462 .682 .900 .013