data_[Na4Cu2Ag2Br8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Cu  1.9000  1.3500  0.8200
  Ag  1.9300  1.6000  1.0867
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [8.9553]
_cell_length_b [7.7082]
_cell_length_c [7.3110]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Na2CuAgBr4]
_chemical_formula_sum '[Na4 Cu2 Ag2 Br8]'
_cell_volume [504.6780]
_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  0.2491  0.6857  0.0057  1.0
  Cu  Cu1  2  0.0000  0.1695  0.9971  1.0
  Ag  Ag2  2  0.0000  0.8302  0.4906  1.0
  Br  Br3  4  0.2328  0.3242  0.8994  1.0
  Br  Br4  2  0.0000  0.1554  0.3363  1.0
  Br  Br5  2  0.0000  0.8728  0.8658  1.0
]