data_[Na3Br3]
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
]
_symmetry_space_group_name_H-M [P3_1]
_cell_length_a [17.3037]
_cell_length_b [17.3037]
_cell_length_c [4.6828]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [144]
_chemical_formula_structural [NaBr]
_chemical_formula_sum '[Na3 Br3]'
_cell_volume [1214.2686]
_cell_formula_units_Z [3]
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  3  0.5373  0.2560  0.6587  1
  Br  Br1  3  0.5394  0.3444  0.1621  1
]