Ba5.5 O60 Ta21.8 Gasperin M Bulletin de la Societe Francaise de Mineralogie et de Cristallographie 90 (1967) 172-175 Structure cristalline du bronze de tungstene: Ba O (Ta2 O5)2 _cod_database_code 1001160 _database_code_amcsd 0012124 17.60 17.60 3.905 90 90 90 P4 atom x y z occ Ba1 .075 .254 0 .55 Ba2 .425 .254 0 .55 Ba3 0 0 0 .55 Ba4 .5 .5 0 .55 Ta1 .252 .249 .5 Ta2 .143 .067 .5 Ta3 .365 .43 .5 Ta4 .432 .86 .5 Ta5 .068 .638 .5 Ta6 .075 .25 .5 .225 Ta7 .426 .25 .5 .225 O1 .251 .25 0 O2 .362 .436 0 O3 .434 .861 0 O4 .152 .058 0 O5 .058 .638 0 O6 .051 .098 .5 O7 .172 .177 .5 O8 .458 .122 .5 O9 .533 .249 .5 O10 .675 .17 .5 O11 .249 .031 .5 O12 .325 .177 .5 O13 .67 .33 .5 O14 .597 .033 .5 O15 .469 .388 .5