data_[K6Tl18Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Tl  1.6200  1.9000  1.3325
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [5.4026]
_cell_length_b [12.2347]
_cell_length_c [14.9897]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [K3Tl9Pb2]
_chemical_formula_sum '[K6 Tl18 Pb4]'
_cell_volume [990.8159]
_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
[
  K  K0  4  0.0000  0.0000  0.3000  1.0
  K  K1  2  0.0000  0.0000  0.0000  1.0
  Tl  Tl2  8  0.0000  0.2713  0.1361  1.0
  Tl  Tl3  8  0.0000  0.3660  0.3360  1.0
  Tl  Tl4  2  0.0000  0.5000  0.0000  1.0
  Pb  Pb5  4  0.0000  0.1843  0.5000  1.0
]