data_[K8Cu4Ag4I20]
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
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.3382]
_cell_length_b [22.5270]
_cell_length_c [13.7691]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [K2CuAgI5]
_chemical_formula_sum '[K8 Cu4 Ag4 I20]'
_cell_volume [1345.6252]
_cell_formula_units_Z [4]
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  4  0.0000  0.1125  0.3068  1.0
  K  K1  4  0.0000  0.1256  0.6847  1.0
  Cu  Cu2  4  0.0000  0.4360  0.4344  1.0
  Ag  Ag3  4  0.0000  0.2222  0.0340  1.0
  I  I4  4  0.0000  0.0329  0.0243  1.0
  I  I5  4  0.0000  0.2860  0.6787  1.0
  I  I6  4  0.0000  0.3218  0.4011  1.0
  I  I7  4  0.0000  0.3481  0.9936  1.0
  I  I8  4  0.0000  0.4898  0.2664  1.0
]