data_global _amcsd_formula_title 'Ce0.5 Cu2 Nd1.5 O9 Pb0.5 Sr2.5' loop_ _publ_author_name 'Gambardella M' 'Domenges B' 'Rouillon T' 'Hervieu M' 'Raveau B' _journal_name_full 'European Journal of Solid State and Inorganic Chemistry' _journal_volume 39 _journal_year 1992 _journal_page_first 333 _journal_page_last 345 _publ_section_title ; 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 _chemical_formula_sum 'Pb.5 Sr2.5 Cu2 (Nd1.5 Ce.5) O9' _cell_length_a 3.8783 _cell_length_b 3.8783 _cell_length_c 29.495 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 443.641 _exptl_crystal_density_diffrn 6.589 _symmetry_space_group_name_H-M 'I 4/m m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' '-y,-x,z' '1/2-y,1/2-x,1/2+z' 'y,x,-z' '1/2+y,1/2+x,1/2-z' 'y,-x,-z' '1/2+y,1/2-x,1/2-z' '-y,x,z' '1/2-y,1/2+x,1/2+z' 'x,-y,z' '1/2+x,1/2-y,1/2+z' '-x,y,-z' '1/2-x,1/2+y,1/2-z' 'x,y,-z' '1/2+x,1/2+y,1/2-z' '-x,-y,z' '1/2-x,1/2-y,1/2+z' 'y,x,z' '1/2+y,1/2+x,1/2+z' '-y,-x,-z' '1/2-y,1/2-x,1/2-z' '-y,x,-z' '1/2-y,1/2+x,1/2-z' 'y,-x,z' '1/2+y,1/2-x,1/2+z' '-x,y,z' '1/2-x,1/2+y,1/2+z' 'x,-y,-z' '1/2+x,1/2-y,1/2-z' '-x,-y,-z' '1/2-x,1/2-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Pb1 0.00000 0.00000 0.00000 0.50000 Sr1 0.00000 0.00000 0.00000 0.50000 Sr2 0.50000 0.50000 0.08640 1.00000 Cu1 0.00000 0.00000 0.14760 1.00000 Nd1 0.50000 0.50000 0.20630 0.75000 Ce1 0.50000 0.50000 0.20630 0.25000 O1 0.50000 0.50000 0.00000 1.00000 O2 0.00000 0.00000 0.07000 1.00000 O3 0.50000 0.00000 0.25000 1.00000 O4 0.50000 0.00000 0.14900 1.00000