data_[Tl18Hg9Pb6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tl  1.6200  1.9000  1.3325
  Hg  2.0000  1.5000  1.2450
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [3.6422]
_cell_length_b [3.6422]
_cell_length_c [88.2765]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Tl6Hg3Pb2]
_chemical_formula_sum '[Tl18 Hg9 Pb6]'
_cell_volume [1014.1489]
_cell_formula_units_Z [3]
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
[
  Tl  Tl0  6  0.0000  0.0000  0.0880  1.0
  Tl  Tl1  6  0.0000  0.0000  0.1824  1.0
  Tl  Tl2  6  0.0000  0.0000  0.3627  1.0
  Hg  Hg3  6  0.0000  0.0000  0.2750  1.0
  Hg  Hg4  3  0.0000  0.0000  0.0000  1.0
  Pb  Pb5  6  0.0000  0.0000  0.4533  1.0
]