data_LaAl2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.53
_cell_length_b   5.53
_cell_length_c   5.08
_cell_angle_alpha   108.48
_cell_angle_beta   108.48
_cell_angle_gamma   45.2
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaAl2Pb
_chemical_formula_sum   'La1 Al2 Pb1'
_cell_volume   103.77
_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
  La  La2  1  0.34  0.0  0.45  1.0
  Al  Al0  1  0.27  0.0  0.6  1.0
  Al  Al1  1  0.36  0.0  0.91  1.0
  Pb  Pb3  1  0.21  0.0  0.98  1.0

data_LaAl2Pb
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.25
_cell_length_b   5.08
_cell_length_c   5.53
_cell_angle_alpha   108.48
_cell_angle_beta   112.6
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaAl2Pb
_chemical_formula_sum   'La1 Al2 Pb1'
_cell_volume   103.77
_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
  La  La0  1  0.0  0.45  0.34  1.0
  Al  Al1  1  0.0  0.6  0.27  1.0
  Al  Al2  1  0.0  0.91  0.36  1.0
  Pb  Pb3  1  0.0  0.98  0.21  1.0

La Al Al Pb
La Al Al Pb 0 1 o o o 2 3 o o o 
LaAl2Pb crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one LaAl2Pb cluster. La(1) is bonded in a distorted bent 150 degrees geometry to one Al(1) and one Pb(1) atom. The La(1)-Al(1) bond length is 0.96 Å. The La(1)-Pb(1) bond length is 2.25 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a distorted single-bond geometry to one La(1) atom. In the second Al site, Al(2) is bonded in a single-bond geometry to one Pb(1) atom. The Al(2)-Pb(1) bond length is 0.97 Å. Pb(1) is bonded in a distorted single-bond geometry to one La(1) and one Al(2) atom.