data_[Cu8Br8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cu  1.9000  1.3500  0.8200
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [I4/m]
_cell_length_a [10.2129]
_cell_length_b [10.2129]
_cell_length_c [4.0393]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [87]
_chemical_formula_structural [CuBr]
_chemical_formula_sum '[Cu8 Br8]'
_cell_volume [421.3159]
_cell_formula_units_Z [8]
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
[
  Cu  Cu0  8  0.1900  0.3051  0.5000  1.0
  Br  Br1  8  0.0649  0.7342  0.5000  1.0
]