data_CuSiAg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.81
_cell_length_b   2.81
_cell_length_c   8.41
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   105.26
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CuSiAg2
_chemical_formula_sum   'Cu1 Si1 Ag2'
_cell_volume   64.07
_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  Cu2  1  0.71  0.0  0.05  1.0
  Si  Si3  1  0.0  0.0  0.32  1.0
  Ag  Ag0  1  0.71  0.0  0.11  1.0
  Ag  Ag1  1  0.0  0.0  0.15  1.0

data_CuSiAg2
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.81
_cell_length_b   2.81
_cell_length_c   8.41
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   105.26
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CuSiAg2
_chemical_formula_sum   'Cu1 Si1 Ag2'
_cell_volume   64.07
_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
  Si  Si0  1  0.0  0.0  0.32  1.0
  Cu  Cu1  1  0.71  0.0  0.05  1.0
  Ag  Ag2  1  0.0  0.0  0.15  1.0
  Ag  Ag3  1  0.71  0.0  0.11  1.0

Cu Si Ag Ag
Cu Si Ag Ag 0 2 o o o 1 3 o o o 2 3 + o o 