data_Pb2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.91
_cell_length_b   3.91
_cell_length_c   11.31
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Pb2C
_chemical_formula_sum   'Pb4 C2'
_cell_volume   149.56
_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
  Pb  Pb2  1  0.0  0.0  0.65  1.0
  Pb  Pb3  1  0.0  0.0  0.0  1.0
  Pb  Pb4  1  0.95  0.13  0.83  1.0
  Pb  Pb5  1  0.0  0.26  0.48  1.0
  C  C0  1  0.95  0.13  0.48  1.0
  C  C1  1  0.0  0.26  0.83  1.0

data_Pb2C
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.91
_cell_length_b   3.91
_cell_length_c   11.31
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Pb2C
_chemical_formula_sum   'Pb4 C2'
_cell_volume   149.56
_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
  Pb  Pb0  1  0.0  0.0  0.0  1.0
  Pb  Pb1  1  0.0  0.0  0.65  1.0
  Pb  Pb2  1  0.0  0.26  0.48  1.0
  Pb  Pb3  1  0.95  0.13  0.83  1.0
  C  C4  1  0.0  0.26  0.83  1.0
  C  C5  1  0.95  0.13  0.48  1.0

Pb Pb Pb Pb C C