data_[Na8Tl4Sn8]
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
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [11.2585]
_cell_length_b [6.3298]
_cell_length_c [8.9445]
_cell_angle_alpha [90.0000]
_cell_angle_beta [117.7460]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na2TlSn2]
_chemical_formula_sum '[Na8 Tl4 Sn8]'
_cell_volume [564.1268]
_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  8  0.1946  0.6362  0.6495  1.0
  Tl  Tl1  4  0.0000  0.3354  0.7500  1.0
  Sn  Sn2  8  0.0954  0.1397  0.4418  1.0
]