data_[Cu3Ag7]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cu  1.9000  1.3500  0.8200
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [Pmmm]
_cell_length_a [2.8746]
_cell_length_b [3.9071]
_cell_length_c [14.4043]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [47]
_chemical_formula_structural [Cu3Ag7]
_chemical_formula_sum '[Cu3 Ag7]'
_cell_volume [161.7823]
_cell_formula_units_Z [1]
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
[
  Cu  Cu0  2  0.0000  0.0000  0.3102  1
  Cu  Cu1  1  0.0000  0.0000  0.5000  1
  Ag  Ag2  2  0.0000  0.0000  0.1071  1
  Ag  Ag3  2  0.5000  0.5000  0.2125  1
  Ag  Ag4  2  0.5000  0.5000  0.4042  1
  Ag  Ag5  1  0.5000  0.5000  0.0000  1
]