data_[Na9Mg3Ag9I24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Mg  1.3100  1.5000  0.8600
  Ag  1.9300  1.6000  1.0867
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [8.8542]
_cell_length_b [8.8542]
_cell_length_c [22.2146]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Na3MgAg3I8]
_chemical_formula_sum '[Na9 Mg3 Ag9 I24]'
_cell_volume [1508.2175]
_cell_formula_units_Z [3]
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  9  0.0000  0.5000  0.0000  1
  Mg  Mg1  3  0.0000  0.0000  0.5000  1
  Ag  Ag2  9  0.0000  0.5000  0.5000  1
  I  I3  18  0.0127  0.5064  0.2416  1
  I  I4  6  0.0000  0.0000  0.2435  1
]