data_[Rb6Cu4I8Br4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cu  1.9000  1.3500  0.8200
  I  2.6600  1.4000  1.2733
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [5.3886]
_cell_length_b [5.3886]
_cell_length_c [29.3548]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Rb3Cu2(I2Br)2]
_chemical_formula_sum '[Rb6 Cu4 I8 Br4]'
_cell_volume [852.3662]
_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
[
  Rb  Rb0  4  0.0000  0.0000  0.1845  1
  Rb  Rb1  2  0.0000  0.0000  0.0000  1
  Cu  Cu2  4  0.0000  0.0000  0.3884  1
  I  I3  8  0.0000  0.5000  0.0889  1
  Br  Br4  4  0.0000  0.0000  0.3027  1
]