data_1001531
_chemical_name_systematic
;
Lead strontium neodymium cerium copper oxide (0.5/2.5/1.5/0.5/2/9)
;
_chemical_formula_structural       '(Pb0.5 Sr0.5) Sr2 (Nd1.5 Ce0.5) Cu2 O9'
_chemical_formula_sum              'Ce.5 Cu2 Nd1.5 O9 Pb.5 Sr2.5'
_publ_section_title
;
Introduction of fluorite layers in the 1212-type structure: the oxide
(Pb~.5~Sr~.5~)Sr~2~Nd~2-x~Ce~x~Cu~2~O~9-d~
;
loop_
_publ_author_name
  'Gambardella, M T'
  'Domenges, B'
  'Rouillon, T'
  'Hervieu, M'
  'Raveau, B'
_journal_name_full
;
European Journal of Solid State Inorganic Chemistry
;
_journal_coden_ASTM                EJSCE5
_journal_volume                    39
_journal_year                      1992
_journal_page_first                333
_journal_page_last                 345
_cell_length_a                     3.8783(2)
_cell_length_b                     3.8783(2)
_cell_length_c                     29.495(2)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       443.6
_cell_formula_units_Z              2
_symmetry_space_group_name_H-M     'I 4/m m m'
_symmetry_Int_Tables_number        139
_symmetry_cell_setting             tetragonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,z'
  '-x,y,z'
  'x,-y,z'
  '-y,x,z'
  'y,-x,z'
  'y,x,z'
  '-y,-x,z'
  '-x,-y,-z'
  'x,y,-z'
  'x,-y,-z'
  '-x,y,-z'
  'y,-x,-z'
  '-y,x,-z'
  '-y,-x,-z'
  'y,x,-z'
  '1/2+x,1/2+y,1/2+z'
  '1/2-x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-y,1/2+x,1/2+z'
  '1/2+y,1/2-x,1/2+z'
  '1/2+y,1/2+x,1/2+z'
  '1/2-y,1/2-x,1/2+z'
  '1/2-x,1/2-y,1/2-z'
  '1/2+x,1/2+y,1/2-z'
  '1/2+x,1/2-y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '1/2+y,1/2-x,1/2-z'
  '1/2-y,1/2+x,1/2-z'
  '1/2-y,1/2-x,1/2-z'
  '1/2+y,1/2+x,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Pb4+   4.000
  Sr2+   2.000
  Cu2+   2.500
  Nd3+   3.000
  Ce3+   3.000
  O2-   -2.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Pb1   Pb4+   2 a 0. 0. 0. 0.5  0 d
  Sr1   Sr2+   2 a 0. 0. 0. 0.5  0 d
  Sr2   Sr2+   4 e 0.5 0.5 0.0864(2) 1.  0 d
  Cu1   Cu2+   4 e 0. 0. 0.1476(5) 1.  0 d
  Nd1   Nd3+   4 e 0.5 0.5 0.2063(1) 0.75  0 d
  Ce1   Ce3+   4 e 0.5 0.5 0.2063(1) 0.25  0 d
  O1    O2-    2 b 0.5 0.5 0. 1.  0 d
  O2    O2-    4 e 0. 0. 0.07(1) 1.  0 d
  O3    O2-    4 d 0.5 0. 0.25 1.  0 d
  O4    O2-    8 g 0.5 0. 0.149(1) 1.  0 d
_refine_ls_R_factor_all            0.058