data_[Na4Bi6O16]
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 [11.7385]
_cell_length_b [6.8165]
_cell_length_c [5.7096]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.7620]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Bi3O8]
_chemical_formula_sum '[Na4 Bi6 O16]'
_cell_volume [432.5821]
_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  0.2121  0.5000  0.6330  1.0
  Bi  Bi1  4  0.0000  0.2628  0.0000  1.0
  Bi  Bi2  2  0.0000  0.0000  0.5000  1.0
  O  O3  8  0.1057  0.2185  0.3873  1.0
  O  O4  4  0.1002  0.0000  0.9019  1.0
  O  O5  4  0.1097  0.5000  0.9425  1.0
]