data_[Ce8Pm4Sb6O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ce  1.1200  1.8500  1.0800
  Pm  1.1300  1.8500  1.1100
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [4.6980]
_cell_length_b [4.6980]
_cell_length_c [26.0711]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Ce4Pm2Sb3O2]
_chemical_formula_sum '[Ce8 Pm4 Sb6 O4]'
_cell_volume [575.4314]
_cell_formula_units_Z [2]
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
[
  Ce  Ce0  8  0.0000  0.5000  0.0843  1
  Pm  Pm1  4  0.0000  0.0000  0.3018  1
  Sb  Sb2  4  0.0000  0.0000  0.1778  1
  Sb  Sb3  2  0.0000  0.0000  0.0000  1
  O  O4  4  0.0000  0.0000  0.3986  1
]