data_[K2Na2Ag4I8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [I222]
_cell_length_a [8.0493]
_cell_length_b [8.6592]
_cell_length_c [9.3132]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [23]
_chemical_formula_structural [KNa(AgI2)2]
_chemical_formula_sum '[K2 Na2 Ag4 I8]'
_cell_volume [649.1409]
_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  1.0
  Na  Na1  2  0.0000  0.0000  0.5000  1.0
  Ag  Ag2  4  0.0000  0.5000  0.1614  1.0
  I  I3  8  0.2450  0.2001  0.3202  1.0
]