data_Si2PbCl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.46
_cell_length_b   3.8
_cell_length_c   6.77
_cell_angle_alpha   90.0
_cell_angle_beta   109.14
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2PbCl
_chemical_formula_sum   'Si2 Pb1 Cl1'
_cell_volume   108.37
_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  Si2  1  0.3  0.0  0.47  1.0
  Si  Si3  1  0.99  0.9  0.68  1.0
  Pb  Pb1  1  0.19  0.9  0.22  1.0
  Cl  Cl0  1  0.89  0.0  0.61  1.0

data_Si2PbCl
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.8
_cell_length_b   4.46
_cell_length_c   6.77
_cell_angle_alpha   109.14
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2PbCl
_chemical_formula_sum   'Si2 Pb1 Cl1'
_cell_volume   108.37
_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  0.7  0.53  1.0
  Si  Si1  1  0.1  0.01  0.32  1.0
  Pb  Pb2  1  0.1  0.81  0.78  1.0
  Cl  Cl3  1  0.0  0.11  0.39  1.0

Si Si Pb Cl