data_[Na12Ag8Br16]
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
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [13.7636]
_cell_length_b [10.6693]
_cell_length_c [7.1387]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.6037]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Na3(AgBr2)2]
_chemical_formula_sum '[Na12 Ag8 Br16]'
_cell_volume [1047.8894]
_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  0.1363  0.1179  0.1170  1
  Na  Na1  4  0.0000  0.3583  0.7500  1
  Ag  Ag2  8  0.2040  0.3527  0.4213  1
  Br  Br3  8  0.0726  0.1463  0.5129  1
  Br  Br4  8  0.1570  0.4044  0.0354  1
]