data_[Cs4Pm2Nb4O14]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Pm  1.1300  1.8500  1.1100
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [4.0844]
_cell_length_b [4.0844]
_cell_length_c [24.3061]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Cs2PmNb2O7]
_chemical_formula_sum '[Cs4 Pm2 Nb4 O14]'
_cell_volume [405.4915]
_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
[
  Cs  Cs0  4  0.0000  0.0000  0.1881  1
  Pm  Pm1  2  0.0000  0.0000  0.0000  1
  Nb  Nb2  4  0.0000  0.0000  0.4151  1
  O  O3  8  0.0000  0.5000  0.0713  1
  O  O4  4  0.0000  0.0000  0.3374  1
  O  O5  2  0.0000  0.0000  0.5000  1
]