data_[K2Tl2Cu2I8]
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
  Cu  1.9000  1.3500  0.8200
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [8.4653]
_cell_length_b [6.9725]
_cell_length_c [9.8268]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.6969]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KTlCuI4]
_chemical_formula_sum '[K2 Tl2 Cu2 I8]'
_cell_volume [555.5644]
_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  2  0.2603  0.7500  0.5621  1.0
  Tl  Tl1  2  0.3100  0.7500  0.0818  1.0
  Cu  Cu2  2  0.2342  0.2500  0.3059  1.0
  I  I3  4  0.0017  0.5069  0.2372  1.0
  I  I4  2  0.3911  0.2500  0.5752  1.0
  I  I5  2  0.4107  0.2500  0.1246  1.0
]