data_Al2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.68
_cell_length_b   4.68
_cell_length_c   7.44
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2Pb
_chemical_formula_sum   'Al4 Pb2'
_cell_volume   141.26
_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
  Al  Al0  1  0.0  0.7  0.1  1.0
  Al  Al1  1  0.34  0.35  0.38  1.0
  Al  Al2  1  0.34  0.35  0.34  1.0
  Al  Al3  1  0.0  0.7  0.06  1.0
  Pb  Pb4  1  0.0  0.0  0.58  1.0
  Pb  Pb5  1  0.0  0.0  0.86  1.0

data_Al2Pb
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.68
_cell_length_b   4.68
_cell_length_c   7.44
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2Pb
_chemical_formula_sum   'Al4 Pb2'
_cell_volume   141.26
_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
  Al  Al0  1  0.0  0.7  0.06  1.0
  Al  Al1  1  0.0  0.7  0.1  1.0
  Al  Al2  1  0.34  0.35  0.34  1.0
  Al  Al3  1  0.34  0.35  0.38  1.0
  Pb  Pb4  1  0.0  0.0  0.58  1.0
  Pb  Pb5  1  0.0  0.0  0.86  1.0

Al Al Al Al Pb Pb
Al Al Al Al Pb Pb 0 3 o o o 0 5 o + - 1 2 o o o 1 4 o o o 2 4 o o o 3 5 o + - 4 5 o o o 
Al2Pb is Cubic alpha N2-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of two Al2Pb clusters. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a single-bond geometry to one Al(4) atom. The Al(1)-Al(4) bond length is 0.34 Å. In the second Al site, Al(4) is bonded in a bent 150 degrees geometry to one Al(1) and one Pb(2) atom. The Al(4)-Pb(2) bond length is 2.02 Å. Pb(2) is bonded in a distorted single-bond geometry to one Al(4) atom.