data_[K6Na8Tl4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  Tl  1.6200  1.9000  1.3325
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.9272]
_cell_length_b [4.8216]
_cell_length_c [10.6924]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.6570]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K3(Na2Tl)2]
_chemical_formula_sum '[K6 Na8 Tl4]'
_cell_volume [799.3404]
_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  0.1283  0.5000  0.3856  1.0
  K  K1  2  0.0000  0.0000  0.0000  1.0
  Na  Na2  4  0.1114  0.0000  0.6929  1.0
  Na  Na3  4  0.1748  0.5000  0.9966  1.0
  Tl  Tl4  4  0.2410  0.0000  0.2325  1.0
]