data_[K1Nb1Tl2I8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Nb  1.6000  1.4500  0.8200
  Tl  1.6200  1.9000  1.3325
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [7.4224]
_cell_length_b [9.9620]
_cell_length_c [8.0495]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.2798]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [KNb(TlI4)2]
_chemical_formula_sum '[K1 Nb1 Tl2 I8]'
_cell_volume [595.0486]
_cell_formula_units_Z [1]
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  1  0.0000  0.5000  0.0000  1.0
  Nb  Nb1  1  0.0000  0.0000  0.0000  1.0
  Tl  Tl2  2  0.5000  0.2576  0.5000  1.0
  I  I3  4  0.2400  0.2003  0.1157  1.0
  I  I4  2  0.1751  0.0000  0.7006  1.0
  I  I5  2  0.2699  0.5000  0.6593  1.0
]