data_[K2Cu4Ag2Cl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Cu  1.9000  1.3500  0.8200
  Ag  1.9300  1.6000  1.0867
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [I222]
_cell_length_a [6.7848]
_cell_length_b [7.7407]
_cell_length_c [8.0998]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [23]
_chemical_formula_structural [KCu2AgCl4]
_chemical_formula_sum '[K2 Cu4 Ag2 Cl8]'
_cell_volume [425.3940]
_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  0.0000  0.0000  0.0000  1
  Cu  Cu1  4  0.0000  0.5000  0.1645  1
  Ag  Ag2  2  0.0000  0.0000  0.5000  1
  Cl  Cl3  8  0.2462  0.3281  0.8152  1
]