data_[Na4Br4N2O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Br  2.9600  1.1500  0.8825
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [8.8620]
_cell_length_b [4.7936]
_cell_length_c [9.0211]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.2661]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Br2NO2]
_chemical_formula_sum '[Na4 Br4 N2 O4]'
_cell_volume [365.9518]
_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  0.2102  0.5000  0.1614  1
  Br  Br1  4  0.1047  0.5000  0.8180  1
  N  N2  2  0.0000  0.0000  0.5000  1
  O  O3  4  0.1422  0.0000  0.5263  1
]