B3 K3 O6 Zachariasen W Journal of Chemical Physics 5 (1937) 919-922 The Crystal Structure of Potassium Metaborate K3 (B3 O6) _cod_database_code 1010521 _database_code_amcsd 0017432 7.76 7.76 7.76 110.6 110.6 110.6 R-3c atom x y z K1 .689 -.189 .25 B1 .361 .139 .25 O1 .465 .035 .25 O2 .146 .354 .25