data_[Na6Cu2Ag6Cl16]
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 [C2/m]
_cell_length_a [13.9080]
_cell_length_b [7.9261]
_cell_length_c [7.7147]
_cell_angle_alpha [90.0000]
_cell_angle_beta [123.1154]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na3CuAg3Cl8]
_chemical_formula_sum '[Na6 Cu2 Ag6 Cl16]'
_cell_volume [712.3009]
_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  0.2500  0.2500  0.0000  1
  Na  Na1  2  0.0000  0.5000  0.5000  1
  Cu  Cu2  2  0.0000  0.0000  0.5000  1
  Ag  Ag3  4  0.2500  0.2500  0.5000  1
  Ag  Ag4  2  0.0000  0.0000  0.0000  1
  Cl  Cl5  8  0.0048  0.2075  0.7202  1
  Cl  Cl6  4  0.2419  0.5000  0.2590  1
  Cl  Cl7  4  0.2446  0.5000  0.7460  1
]