data_[Rb4Tl2Br8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Tl  1.6200  1.9000  1.3325
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [8.3270]
_cell_length_b [7.8931]
_cell_length_c [9.7448]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.6829]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [Rb2TlBr4]
_chemical_formula_sum '[Rb4 Tl2 Br8]'
_cell_volume [610.2223]
_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  2  0.2546  0.7500  0.4458  1.0
  Rb  Rb1  2  0.2777  0.7500  0.9358  1.0
  Tl  Tl2  2  0.2537  0.2500  0.1890  1.0
  Br  Br3  4  0.4978  0.5175  0.2524  1.0
  Br  Br4  2  0.0430  0.2500  0.8957  1.0
  Br  Br5  2  0.0611  0.2500  0.3858  1.0
]