data_Si3Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.12
_cell_length_b   7.51
_cell_length_c   3.58
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si3Ag
_chemical_formula_sum   'Si6 Ag2'
_cell_volume   137.54
_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
  Si  Si2  1  0.0  0.0  0.71  1.0
  Si  Si3  1  0.56  0.75  0.86  1.0
  Si  Si4  1  0.56  0.44  0.08  1.0
  Si  Si5  1  0.56  0.07  0.08  1.0
  Si  Si6  1  0.0  0.68  0.5  1.0
  Si  Si7  1  0.0  0.82  0.5  1.0
  Ag  Ag0  1  0.56  0.0  0.86  1.0
  Ag  Ag1  1  0.0  0.75  0.71  1.0

data_Si3Ag
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.58
_cell_length_b   5.12
_cell_length_c   7.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si3Ag
_chemical_formula_sum   'Si6 Ag2'
_cell_volume   137.54
_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
  Si  Si0  1  0.08  0.56  0.07  1.0
  Si  Si1  1  0.08  0.56  0.44  1.0
  Si  Si2  1  0.5  -0.0  0.82  1.0
  Si  Si3  1  0.5  -0.0  0.68  1.0
  Si  Si4  1  0.71  0.0  0.0  1.0
  Si  Si5  1  0.86  0.56  0.75  1.0
  Ag  Ag6  1  0.71  -0.0  0.75  1.0
  Ag  Ag7  1  0.86  0.56  0.0  1.0

Si Si Si Si Si Si Ag Ag
Si Si Si Si Si Si Ag Ag 0 5 o - o 0 7 o - o 1 6 o + o 1 2 o o + 2 3 o o o 3 6 o o - 4 7 o o o 4 5 o o o 5 7 o o o 