Santite Zachariasen W Zeitschrift fur Kristallographie 98 (1938) 266-274 The crystal structure of potassium acid dihydronium pentaborate K H2 (H3 O)2 B5 O10, (potassium pentaborate tetrahydrate) _cod_database_code 1011124 _database_code_amcsd 0018018 11.08 11.14 8.97 90 90 90 Aba2 atom x y z K1 0 0 0 B1 0 0 .3889 B2 .1944 .0972 .3194 B3 .1944 -.0694 .5 O1 .0764 .0833 .2917 O2 .0764 -.0833 .4861 O3 .2222 -.1389 .0833 O4 .25 .0208 .4167 O5 .25 .1806 .25 O6 0 .1667 .75