data_Cu2SbPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.55
_cell_length_b   3.55
_cell_length_c   6.55
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu2SbPb
_chemical_formula_sum   'Cu2 Sb1 Pb1'
_cell_volume   82.7
_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  0.78  0.78  0.33  1.0
  Cu  Cu1  1  0.78  0.78  0.22  1.0
  Sb  Sb3  1  0.0  0.0  0.0  1.0
  Pb  Pb2  1  0.0  0.0  0.28  1.0

data_Cu2SbPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.02
_cell_length_b   5.02
_cell_length_c   6.55
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Cu2SbPb
_chemical_formula_sum   'Cu4 Sb2 Pb2'
_cell_volume   165.41
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.28  0.5  0.22  1.0
  Cu  Cu1  2  0.28  0.5  0.33  1.0
  Sb  Sb2  2  0.0  0.0  0.0  1.0
  Pb  Pb3  2  0.0  0.0  0.28  1.0

Cu Cu Sb Pb
Cu Cu Sb Pb 0 1 o o o 0 3 + + o 1 2 + + o 1 3 + + o 2 3 o o o 
Cu2PbSb is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Cu2PbSb clusters. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 2-coordinate geometry to one Cu(2) and one Pb(1) atom. The Cu(1)-Cu(2) bond length is 0.75 Å. The Cu(1)-Pb(1) bond length is 1.19 Å. In the second Cu site, Cu(2) is bonded in a 2-coordinate geometry to one Cu(1), one Pb(1), and one Sb(1) atom. The Cu(2)-Pb(1) bond length is 1.19 Å. The Cu(2)-Sb(1) bond length is 1.83 Å. Pb(1) is bonded in a 3-coordinate geometry to one Cu(1), one Cu(2), and one Sb(1) atom. The Pb(1)-Sb(1) bond length is 1.81 Å. Sb(1) is bonded in a 2-coordinate geometry to one Cu(2) and one Pb(1) atom.