Nb9 O25 P Benabbas A, Borel M, Grandin A, Leclaire A, Raveau B Acta Crystallographica C47 (1991) 849-850 Redetermination of the structure of PNb9O25 _cod_database_code 1001529 _database_code_amcsd 0010248 15.639 15.639 3.8317 90 90 90 I4/m atom x y z occ Nb1 0 0 .043 .5 Nb2 .1086 .2178 0 Nb3 .3291 .1158 0 P1 .5 0 .25 .5 O1 .0461 .115 0 O2 .2204 .1733 0 O3 .1557 .3553 0 O4 .2852 .0112 0 O5 .4491 .0685 0 O6 .3872 .2469 0 O7 0 0 .5