data_[Ba4Na8O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Na  0.9300  1.8000  1.1600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [3.7954]
_cell_length_b [13.4039]
_cell_length_c [7.6711]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [BaNa2O2]
_chemical_formula_sum '[Ba4 Na8 O8]'
_cell_volume [390.2490]
_cell_formula_units_Z [4]
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
[
  Ba  Ba0  4  0.0000  0.1953  0.0654  1.0
  Na  Na1  4  0.0000  0.0492  0.6146  1.0
  Na  Na2  4  0.0000  0.4235  0.8571  1.0
  O  O3  4  0.0000  0.1836  0.4179  1.0
  O  O4  4  0.0000  0.4494  0.5599  1.0
]