Ce0.5 Cu2 Nd1.5 O9 Pb0.5 Sr2.5 Gambardella M, Domenges B, Rouillon T, Hervieu M, Raveau B European Journal of Solid State and Inorganic Chemistry 39 (1992) 333-345 Introduction of fluorite layers in the 1212-type structure: the oxide (Pb.5Sr.5)Sr2Nd2-xCexCu2O9-d _cod_database_code 1001531 _database_code_amcsd 0012629 3.8783 3.8783 29.495 90 90 90 I4/mmm atom x y z occ Pb1 0 0 0 .5 Sr1 0 0 0 .5 Sr2 .5 .5 .0864 Cu1 0 0 .1476 Nd1 .5 .5 .2063 .75 Ce1 .5 .5 .2063 .25 O1 .5 .5 0 O2 0 0 .07 O3 .5 0 .25 O4 .5 0 .149