data_[Na2Tl2Cu4I8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  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 [I222]
_cell_length_a [7.8201]
_cell_length_b [8.6027]
_cell_length_c [8.8672]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [23]
_chemical_formula_structural [NaTl(CuI2)2]
_chemical_formula_sum '[Na2 Tl2 Cu4 I8]'
_cell_volume [596.5387]
_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
[
  Na  Na0  2  0.0000  0.0000  0.5000  1.0
  Tl  Tl1  2  0.0000  0.0000  0.0000  1.0
  Cu  Cu2  4  0.0000  0.5000  0.1449  1.0
  I  I3  8  0.2327  0.3139  0.8130  1.0
]