data_[Rb8Tl4Sn4Sb8]
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
  Sn  1.9600  1.4500  0.8300
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [7.9887]
_cell_length_b [15.9736]
_cell_length_c [7.7941]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [Rb2TlSnSb2]
_chemical_formula_sum '[Rb8 Tl4 Sn4 Sb8]'
_cell_volume [994.5934]
_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  0.2434  0.1672  0.5000  1.0
  Tl  Tl1  4  0.0000  0.0000  0.2500  1.0
  Sn  Sn2  4  0.0000  0.5000  0.2500  1.0
  Sb  Sb3  8  0.2257  0.4072  0.5000  1.0
]