data_NbCoPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.22
_cell_length_b   3.22
_cell_length_c   8.43
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbCoPb2
_chemical_formula_sum   'Nb1 Co1 Pb2'
_cell_volume   87.3
_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
  Nb  Nb1  1  0.61  0.61  0.8  1.0
  Co  Co0  1  0.0  0.0  0.64  1.0
  Pb  Pb2  1  0.0  0.0  0.01  1.0
  Pb  Pb3  1  0.61  0.61  0.64  1.0

data_NbCoPb2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.55
_cell_length_b   4.55
_cell_length_c   8.43
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NbCoPb2
_chemical_formula_sum   'Nb2 Co2 Pb4'
_cell_volume   174.59
_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
  Nb  Nb0  2  0.11  0.5  0.8  1.0
  Co  Co1  2  0.0  0.0  0.64  1.0
  Pb  Pb2  2  0.0  0.0  0.01  1.0
  Pb  Pb3  2  0.11  0.5  0.64  1.0

Nb Co Pb Pb
NbCoPb2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two NbCoPb2 clusters. Nb(1) is bonded in a single-bond geometry to one Pb(1) and one Pb(2) atom. The Nb(1)-Pb(1) bond length is 2.55 Å. The Nb(1)-Pb(2) bond length is 1.37 Å. Co(1) is bonded in a 1-coordinate geometry to one Pb(2) atom. The Co(1)-Pb(2) bond length is 1.78 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 1-coordinate geometry to one Nb(1) atom. In the second Pb site, Pb(2) is bonded in a distorted single-bond geometry to one Nb(1) and one Co(1) atom.