Ce0.4 Cu2 Gd1.6 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 1001581 _database_code_amcsd 0015042 3.8429 3.8429 29.5096 90 90 90 I4/mmm atom x y z occ Tl1 .027 0 0 .125 Pb1 .027 0 0 .125 Sr1 0 0 .5878 Gd1 0 0 .7076 .8 Ce1 0 0 .7076 .2 Cu1 0 0 .1477 O1 0 0 .0734 O2 0 .5 .1484 O3 0 .5 .25 O4 .5 .5 0