TlNb2U2O11.5 Gasperin M Journal of Solid State Chemistry 67 (1987) 219-224 Synthese et structure de trois niobouranates d'ions monovalents: TlNb2U2O11.5, KNbUO6, et RbNbUO6 _cod_database_code 1001355 _database_code_amcsd 0013597 7.713 10.329 13.947 90 90 90 Pmnb atom x y z occ U1 .25 .2046 .2105 U2 .25 .8353 .7612 Nb1 .4992 .4609 .1090 Tl1 .0200 .8685 .0418 .5 O1 .25 .1089 .1045 O2 .25 .4047 .1178 O3 .25 .4343 .6356 O4 .5306 .2903 .1715 O5 .25 .5020 .8590 O6 .25 .2321 .8386 O7 .25 .8013 .1855 O8 .0349 .5791 .2195 O9 .0505 .6133 .0197 .75