data_Ta2SbPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.5
_cell_length_b   3.5
_cell_length_c   7.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2SbPb
_chemical_formula_sum   'Ta2 Sb1 Pb1'
_cell_volume   96.89
_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
  Ta  Ta2  1  0.75  0.75  0.22  1.0
  Ta  Ta3  1  0.0  0.0  0.63  1.0
  Sb  Sb1  1  0.0  0.0  0.54  1.0
  Pb  Pb0  1  0.75  0.75  0.46  1.0

data_Ta2SbPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.95
_cell_length_b   4.95
_cell_length_c   7.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ta2SbPb
_chemical_formula_sum   'Ta4 Sb2 Pb2'
_cell_volume   193.78
_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
  Ta  Ta0  2  0.0  0.0  0.63  1.0
  Ta  Ta1  2  0.25  0.5  0.22  1.0
  Sb  Sb2  2  0.0  0.0  0.54  1.0
  Pb  Pb3  2  0.25  0.5  0.46  1.0

Ta Ta Sb Pb
Ta2PbSb crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Ta2PbSb clusters. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a single-bond geometry to one Pb(1) atom. The Ta(1)-Pb(1) bond length is 1.93 Å. In the second Ta site, Ta(2) is bonded in a single-bond geometry to one Sb(1) atom. The Ta(2)-Sb(1) bond length is 0.68 Å. Pb(1) is bonded in a distorted bent 120 degrees geometry to one Ta(1) and one Sb(1) atom. The Pb(1)-Sb(1) bond length is 1.39 Å. Sb(1) is bonded in a distorted bent 120 degrees geometry to one Ta(2) and one Pb(1) atom.