data_[Na8Bi2O8]
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 [11.5553]
_cell_length_b [3.5028]
_cell_length_c [8.3284]
_cell_angle_alpha [90.0000]
_cell_angle_beta [122.2603]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na4BiO4]
_chemical_formula_sum '[Na8 Bi2 O8]'
_cell_volume [285.0610]
_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  0.1337  0.0000  0.3932  1
  Na  Na1  4  0.2068  0.5000  0.8194  1
  Bi  Bi2  2  0.0000  0.5000  0.0000  1
  O  O3  4  0.0752  0.0000  0.8918  1
  O  O4  4  0.2023  0.5000  0.2796  1
]