data_[Na16Bi4O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [18.3385]
_cell_length_b [5.3188]
_cell_length_c [6.3895]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.1919]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na8Bi2O]
_chemical_formula_sum '[Na16 Bi4 O2]'
_cell_volume [584.9229]
_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  4  0.0009  0.0000  0.2337  1
  Na  Na1  4  0.0979  0.5000  0.8506  1
  Na  Na2  4  0.1054  0.5000  0.3307  1
  Na  Na3  4  0.2259  0.0000  0.2191  1
  Bi  Bi4  4  0.1604  0.0000  0.6575  1
  O  O5  2  0.0000  0.5000  0.0000  1
]