data_[Na6Tl4Sn8]
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/m]
_cell_length_a [15.1398]
_cell_length_b [3.5028]
_cell_length_c [9.8678]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.0916]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na3(TlSn2)2]
_chemical_formula_sum '[Na6 Tl4 Sn8]'
_cell_volume [502.8031]
_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
[
  Na  Na0  4  0.1591  0.5000  0.5520  1
  Na  Na1  2  0.0000  0.0000  0.0000  1
  Tl  Tl2  4  0.1715  0.5000  0.2245  1
  Sn  Sn3  4  0.0044  0.0000  0.6686  1
  Sn  Sn4  4  0.1607  0.5000  0.8853  1
]