data_[Tl2Cu2Cl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tl  1.6200  1.9000  1.3325
  Cu  1.9000  1.3500  0.8200
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P-42c]
_cell_length_a [5.8971]
_cell_length_b [5.8971]
_cell_length_c [11.1075]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [112]
_chemical_formula_structural [TlCuCl4]
_chemical_formula_sum '[Tl2 Cu2 Cl8]'
_cell_volume [386.2742]
_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
[
  Tl  Tl0  2  0.0000  0.0000  0.0000  1.0
  Cu  Cu1  2  0.0000  0.5000  0.2500  1.0
  Cl  Cl2  8  0.2252  0.2739  0.3692  1.0
]