data_[Na4Tb2Ce2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Tb  1.1000  1.7500  0.9815
  Ce  1.1200  1.8500  1.0800
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I-4m2]
_cell_length_a [4.7004]
_cell_length_b [4.7004]
_cell_length_c [10.6122]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [119]
_chemical_formula_structural [Na2TbCeO4]
_chemical_formula_sum '[Na4 Tb2 Ce2 O8]'
_cell_volume [234.4675]
_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
[
  Na  Na0  2  0.0000  0.0000  0.0000  1
  Na  Na1  2  0.0000  0.5000  0.7500  1
  Tb  Tb2  2  0.0000  0.5000  0.2500  1
  Ce  Ce3  2  0.0000  0.0000  0.5000  1
  O  O4  4  0.0000  0.0000  0.2675  1
  O  O5  4  0.0000  0.5000  0.0363  1
]