data_[Na18Tl2Cd8]
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
  Cd  1.6900  1.5500  1.0900
]
_symmetry_space_group_name_H-M [P6_3/mmc]
_cell_length_a [10.0058]
_cell_length_b [10.0058]
_cell_length_c [9.7371]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [194]
_chemical_formula_structural [Na9TlCd4]
_chemical_formula_sum '[Na18 Tl2 Cd8]'
_cell_volume [844.2381]
_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  12  0.1909  0.3819  0.0526  1
  Na  Na1  6  0.0743  0.5372  0.7500  1
  Tl  Tl2  2  0.3333  0.6667  0.2500  1
  Cd  Cd3  6  0.1101  0.2202  0.7500  1
  Cd  Cd4  2  0.0000  0.0000  0.0000  1
]