data_Cu3Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.92
_cell_length_b   4.92
_cell_length_c   4.92
_cell_angle_alpha   135.61
_cell_angle_beta   129.98
_cell_angle_gamma   69.08
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu3Pb
_chemical_formula_sum   'Cu3 Pb1'
_cell_volume   62.83
_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  0.86  0.0  0.93  1.0
  Cu  Cu1  1  0.0  0.08  0.13  1.0
  Cu  Cu2  1  0.0  0.0  0.0  1.0
  Pb  Pb3  1  0.0  0.0  0.06  1.0

data_Cu3Pb
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.72
_cell_length_b   4.16
_cell_length_c   4.92
_cell_angle_alpha   115.01
_cell_angle_beta   112.2
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu3Pb
_chemical_formula_sum   'Cu3 Pb1'
_cell_volume   62.83
_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  0.0  1.0
  Cu  Cu1  1  0.0  0.93  0.07  1.0
  Cu  Cu2  1  0.92  0.04  0.04  1.0
  Pb  Pb3  1  0.0  0.06  0.06  1.0

Cu Cu Cu Pb