data_[Na2Cu2Ag2Cl8]
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
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.7509]
_cell_length_b [7.0767]
_cell_length_c [7.4032]
_cell_angle_alpha [90.0000]
_cell_angle_beta [105.7236]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [NaCuAgCl4]
_chemical_formula_sum '[Na2 Cu2 Ag2 Cl8]'
_cell_volume [340.4498]
_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  2  0.2080  0.2500  0.0473  1
  Cu  Cu1  2  0.2633  0.7500  0.3254  1
  Ag  Ag2  2  0.2191  0.2500  0.5445  1
  Cl  Cl3  4  0.0249  0.5087  0.2621  1
  Cl  Cl4  2  0.4713  0.7500  0.6193  1
  Cl  Cl5  2  0.4843  0.7500  0.1432  1
]