data_[Na8Cu4Ag4Br20]
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 [Cmc2_1]
_cell_length_a [4.0251]
_cell_length_b [19.7460]
_cell_length_c [12.8166]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Na2CuAgBr5]
_chemical_formula_sum '[Na8 Cu4 Ag4 Br20]'
_cell_volume [1018.6547]
_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  4  0.0000  0.0863  0.6409  1
  Na  Na1  4  0.0000  0.1156  0.3264  1
  Cu  Cu2  4  0.0000  0.4283  0.4231  1
  Ag  Ag3  4  0.0000  0.2176  0.0501  1
  Br  Br4  4  0.0000  0.0436  0.0199  1
  Br  Br5  4  0.0000  0.2882  0.6950  1
  Br  Br6  4  0.0000  0.3072  0.4048  1
  Br  Br7  4  0.0000  0.3608  0.9992  1
  Br  Br8  4  0.0000  0.4962  0.2647  1
]