Cu2 Gd2 O9 Pb0.5 Sr2 Tl0.5 Vijayaraghavan R, Michel C, Maignan A, Hervieu M, Martin C, Raveau B, Rao C Physica C 206 (1993) 81-89 Structure and properties of Tl0.5Pb0.5Sr2Gd2-xCexCu2O9-d _cod_database_code 1001580 _database_code_amcsd 0015041 3.8385 3.8385 29.5815 90 90 90 I4/mmm atom x y z occ Tl1 .055 0 0 .125 Pb1 .055 0 0 .125 Sr1 0 0 .5866 Gd1 0 0 .7062 Cu1 0 0 .1493 O1 0 0 .0734 O2 0 .5 .1487 O3 0 .5 .25 O4 .5 .5 0