data_[Cu4Ag8Br20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cu  1.9000  1.3500  0.8200
  Ag  1.9300  1.6000  1.0867
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [5.6143]
_cell_length_b [13.3183]
_cell_length_c [12.5343]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [CuAg2Br5]
_chemical_formula_sum '[Cu4 Ag8 Br20]'
_cell_volume [937.2298]
_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
[
  Cu  Cu0  4  0.0000  0.2163  0.2500  1.0
  Ag  Ag1  8  0.0000  0.1388  0.5850  1.0
  Br  Br2  8  0.0000  0.0776  0.1176  1.0
  Br  Br3  8  0.0000  0.3448  0.1026  1.0
  Br  Br4  4  0.0000  0.2649  0.7500  1.0
]