data_Cu2GePb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.76
_cell_length_b   4.26
_cell_length_c   4.5
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu2GePb
_chemical_formula_sum   'Cu2 Ge1 Pb1'
_cell_volume   72.0
_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  0.0  0.13  0.25  1.0
  Cu  Cu1  1  0.0  0.0  0.0  1.0
  Ge  Ge2  1  0.88  0.0  0.25  1.0
  Pb  Pb3  1  0.88  0.13  0.0  1.0

data_Cu2GePb
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.76
_cell_length_b   4.26
_cell_length_c   4.5
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu2GePb
_chemical_formula_sum   'Cu2 Ge1 Pb1'
_cell_volume   72.0
_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  -0.0  0.13  0.25  1.0
  Cu  Cu1  1  0.0  0.0  0.0  1.0
  Ge  Ge2  1  0.88  0.0  0.25  1.0
  Pb  Pb3  1  0.88  0.13  -0.0  1.0

Cu Cu Ge Pb
Cu Cu Ge Pb 0 2 - o o 1 3 - o o 
CuPbCuGe is Cubic alpha N2-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one CuGe cluster and one CuPb cluster. In the CuGe cluster, Cu(1) is bonded in a 1-coordinate geometry to one Ge(1) atom. The Cu(1)-Ge(1) bond length is 0.71 Å. Ge(1) is bonded in a distorted single-bond geometry to one Cu(1) atom. In the CuPb cluster, Cu(2) is bonded in a single-bond geometry to one Pb(1) atom. The Cu(2)-Pb(1) bond length is 0.71 Å. Pb(1) is bonded in a distorted single-bond geometry to one Cu(2) atom.