data_[Na6Ag2Br8]
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 [Pmmn]
_cell_length_a [6.0026]
_cell_length_b [9.9451]
_cell_length_c [8.6425]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [59]
_chemical_formula_structural [Na3AgBr4]
_chemical_formula_sum '[Na6 Ag2 Br8]'
_cell_volume [515.9288]
_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  4  0.0000  0.2478  0.3316  1.0
  Na  Na1  2  0.0000  0.5000  0.8440  1.0
  Ag  Ag2  2  0.0000  0.0000  0.8275  1.0
  Br  Br3  4  0.0000  0.2453  0.6704  1.0
  Br  Br4  2  0.0000  0.0000  0.1512  1.0
  Br  Br5  2  0.0000  0.5000  0.1740  1.0
]