data_Ag2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.91
_cell_length_b   5.91
_cell_length_c   7.61
_cell_angle_alpha   110.27
_cell_angle_beta   110.27
_cell_angle_gamma   32.17
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ag2Pb
_chemical_formula_sum   'Ag4 Pb2'
_cell_volume   131.91
_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
  Ag  Ag0  1  0.22  0.0  0.72  1.0
  Ag  Ag1  1  0.5  0.0  0.79  1.0
  Ag  Ag2  1  0.1  0.0  0.31  1.0
  Ag  Ag3  1  0.38  0.0  0.38  1.0
  Pb  Pb4  1  0.12  0.0  0.2  1.0
  Pb  Pb5  1  0.49  0.0  0.9  1.0

data_Ag2Pb
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.27
_cell_length_b   5.91
_cell_length_c   7.61
_cell_angle_alpha   110.27
_cell_angle_beta   90.0
_cell_angle_gamma   106.08
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Ag2Pb
_chemical_formula_sum   'Ag4 Pb2'
_cell_volume   131.91
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Ag  Ag0  2  0.0  0.3  0.76  1.0
  Ag  Ag1  2  0.0  0.42  0.17  1.0
  Pb  Pb2  2  0.0  0.31  0.65  1.0

Ag Ag Ag Ag Pb Pb
Ag2Pb crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two Ag2Pb clusters. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 2-coordinate geometry to one Ag(2) and one Pb(1) atom. The Ag(1)-Ag(2) bond length is 1.54 Å. The Ag(1)-Pb(1) bond length is 1.68 Å. In the second Ag site, Ag(2) is bonded in a single-bond geometry to one Ag(1) and one Pb(1) atom. The Ag(2)-Pb(1) bond length is 0.86 Å. Pb(1) is bonded in a single-bond geometry to one Ag(1) and one Ag(2) atom.