data_Ta2TcPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.29
_cell_length_b   5.29
_cell_length_c   4.82
_cell_angle_alpha   108.74
_cell_angle_beta   108.74
_cell_angle_gamma   36.2
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2TcPb
_chemical_formula_sum   'Ta2 Tc1 Pb1'
_cell_volume   75.05
_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  Ta1  1  0.36  0.0  0.45  1.0
  Ta  Ta2  1  0.16  0.0  0.39  1.0
  Tc  Tc3  1  0.34  0.0  0.3  1.0
  Pb  Pb0  1  0.22  0.0  0.21  1.0

data_Ta2TcPb
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.29
_cell_length_b   4.82
_cell_length_c   5.29
_cell_angle_alpha   108.74
_cell_angle_beta   108.1
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2TcPb
_chemical_formula_sum   'Ta2 Tc1 Pb1'
_cell_volume   75.05
_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  Ta0  1  0.0  0.39  0.16  1.0
  Ta  Ta1  1  0.0  0.45  0.36  1.0
  Tc  Tc2  1  0.0  0.3  0.34  1.0
  Pb  Pb3  1  0.0  0.21  0.22  1.0

Ta Ta Tc Pb
Ta Ta Tc Pb 0 2 o o o 0 1 o o o 1 3 o o o 1 2 o o o 2 3 o o o 
Ta2TcPb crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Ta2TcPb cluster. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a distorted single-bond geometry to one Ta(2) and one Tc(1) atom. The Ta(1)-Ta(2) bond length is 1.02 Å. The Ta(1)-Tc(1) bond length is 0.71 Å. In the second Ta site, Ta(2) is bonded in a distorted single-bond geometry to one Ta(1) and one Pb(1) atom. The Ta(2)-Pb(1) bond length is 1.01 Å. Tc(1) is bonded in a bent 120 degrees geometry to one Ta(1) and one Pb(1) atom. The Tc(1)-Pb(1) bond length is 0.65 Å. Pb(1) is bonded in an L-shaped geometry to one Ta(2) and one Tc(1) atom.