data_Si2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.49
_cell_length_b   5.49
_cell_length_c   8.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2Sn
_chemical_formula_sum   'Si8 Sn4'
_cell_volume   227.06
_cell_formula_units_Z   4
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  0.35  1.0
  Si  Si1  1  0.0  0.0  0.0  1.0
  Si  Si2  1  0.35  0.95  0.53  1.0
  Si  Si3  1  0.4  0.81  0.18  1.0
  Si  Si4  1  0.65  0.95  0.53  1.0
  Si  Si5  1  0.0  0.61  0.53  1.0
  Si  Si6  1  0.74  0.14  0.18  1.0
  Si  Si7  1  0.09  0.81  0.18  1.0
  Sn  Sn8  1  0.74  0.58  0.87  1.0
  Sn  Sn9  1  0.0  0.17  0.52  1.0
  Sn  Sn10  1  0.0  0.17  0.83  1.0
  Sn  Sn11  1  0.74  0.58  0.18  1.0

data_Si2Sn
_symmetry_space_group_name_H-M   P1
_cell_length_a   5.49
_cell_length_b   5.49
_cell_length_c   8.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2Sn
_chemical_formula_sum   'Si8 Sn4'
_cell_volume   227.06
_cell_formula_units_Z   4
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  0.61  0.53  1.0
  Si  Si1  1  0.0  0.0  0.0  1.0
  Si  Si2  1  0.0  0.0  0.35  1.0
  Si  Si3  1  0.09  0.81  0.18  1.0
  Si  Si4  1  0.35  0.95  0.53  1.0
  Si  Si5  1  0.4  0.81  0.18  1.0
  Si  Si6  1  0.65  0.95  0.53  1.0
  Si  Si7  1  0.74  0.14  0.18  1.0
  Sn  Sn8  1  -0.0  0.17  0.52  1.0
  Sn  Sn9  1  -0.0  0.17  0.83  1.0
  Sn  Sn10  1  0.74  0.58  0.18  1.0
  Sn  Sn11  1  0.74  0.58  0.87  1.0

Si Si Si Si Si Si Si Si Sn Sn Sn Sn