data_Cu2SiPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.65
_cell_length_b   7.65
_cell_length_c   7.65
_cell_angle_alpha   25.61
_cell_angle_beta   25.61
_cell_angle_gamma   25.61
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu2SiPb
_chemical_formula_sum   'Cu2 Si1 Pb1'
_cell_volume   73.75
_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  1  0.0  0.0  0.03  1.0
  Cu  Cu1  1  0.0  0.0  0.9  1.0
  Si  Si3  1  0.0  0.0  0.14  1.0
  Pb  Pb2  1  0.0  0.0  0.22  1.0

data_Cu2SiPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.88
_cell_length_b   3.39
_cell_length_c   7.65
_cell_angle_alpha   90.0
_cell_angle_beta   104.83
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Cu2SiPb
_chemical_formula_sum   'Cu4 Si2 Pb2'
_cell_volume   147.5
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.0  0.0  0.1  1.0
  Si  Si1  2  0.0  0.0  0.86  1.0
  Cu  Cu2  2  0.0  0.0  0.97  1.0
  Pb  Pb3  2  0.0  0.0  0.78  1.0

Cu Cu Si Pb