data_[Rb8Tl8I20]
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
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [Ima2]
_cell_length_a [24.6234]
_cell_length_b [9.0439]
_cell_length_c [8.6870]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [46]
_chemical_formula_structural [Rb2Tl2I5]
_chemical_formula_sum '[Rb8 Tl8 I20]'
_cell_volume [1934.5076]
_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  0.1048  0.0295  0.4944  1.0
  Tl  Tl1  4  0.0000  0.0000  0.0276  1.0
  Tl  Tl2  4  0.2500  0.5633  0.4433  1.0
  I  I3  8  0.0180  0.7426  0.2720  1.0
  I  I4  8  0.1291  0.0703  0.0513  1.0
  I  I5  4  0.2500  0.5885  0.0576  1.0
]