data_[Na2Ag2I8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  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 [P2_1/c]
_cell_length_a [8.2224]
_cell_length_b [4.7306]
_cell_length_c [13.2368]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.8229]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [NaAgI4]
_chemical_formula_sum '[Na2 Ag2 I8]'
_cell_volume [477.9753]
_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  0.5000  0.0000  0.5000  1.0
  Ag  Ag1  2  0.0000  0.0000  0.0000  1.0
  I  I2  4  0.2133  0.5601  0.3743  1.0
  I  I3  4  0.2616  0.6718  0.1396  1.0
]