data_[Na8Ag4I8Br4]
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
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [15.6256]
_cell_length_b [8.7195]
_cell_length_c [6.6221]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Na2AgI2Br]
_chemical_formula_sum '[Na8 Ag4 I8 Br4]'
_cell_volume [902.2463]
_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
[
  Na  Na0  8  0.1555  0.3181  0.7607  1
  Ag  Ag1  4  0.0000  0.1641  0.2002  1
  I  I2  8  0.1575  0.3202  0.2663  1
  Br  Br3  4  0.0000  0.1457  0.7724  1
]