data_[Na8Tl8Sb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Tl  1.6200  1.9000  1.3325
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.9567]
_cell_length_b [4.6803]
_cell_length_c [11.5179]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.4329]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Tl2Sb]
_chemical_formula_sum '[Na8 Tl8 Sb4]'
_cell_volume [590.6300]
_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
[
  Na  Na0  4  0.0667  0.0000  0.6549  1.0
  Na  Na1  4  0.1568  0.0000  0.9447  1.0
  Tl  Tl2  4  0.0439  0.5000  0.1495  1.0
  Tl  Tl3  4  0.1506  0.5000  0.4416  1.0
  Sb  Sb4  4  0.2231  0.0000  0.2316  1.0
]