data_[Rb8Bi4Br20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Bi  2.0200  1.6000  1.0350
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [13.8977]
_cell_length_b [9.4571]
_cell_length_c [8.9208]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [Rb2BiBr5]
_chemical_formula_sum '[Rb8 Bi4 Br20]'
_cell_volume [1172.4917]
_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
[
  Rb  Rb0  8  0.1670  0.5081  0.4163  1
  Bi  Bi1  4  0.0027  0.7500  0.9397  1
  Br  Br2  8  0.0585  0.0502  0.8277  1
  Br  Br3  4  0.0151  0.7500  0.5954  1
  Br  Br4  4  0.1882  0.7500  0.0955  1
  Br  Br5  4  0.1987  0.2500  0.1370  1
]