data_TaTc2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.27
_cell_length_b   3.27
_cell_length_c   6.53
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaTc2Pb
_chemical_formula_sum   'Ta1 Tc2 Pb1'
_cell_volume   69.84
_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  0.0  0.0  0.0  1.0
  Tc  Tc2  1  0.64  0.64  0.52  1.0
  Tc  Tc3  1  0.64  0.64  0.01  1.0
  Pb  Pb0  1  0.0  0.0  0.26  1.0

data_TaTc2Pb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.63
_cell_length_b   4.63
_cell_length_c   6.53
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TaTc2Pb
_chemical_formula_sum   'Ta2 Tc4 Pb2'
_cell_volume   139.68
_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  0.0  1.0
  Tc  Tc1  2  0.14  0.5  0.01  1.0
  Tc  Tc2  2  0.14  0.5  0.52  1.0
  Pb  Pb3  2  0.0  0.0  0.26  1.0

Ta Tc Tc Pb
TaTc2Pb crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two TaTc2Pb clusters. Ta(1) is bonded in a 2-coordinate geometry to one Tc(2) and one Pb(1) atom. The Ta(1)-Tc(2) bond length is 1.69 Å. The Ta(1)-Pb(1) bond length is 1.72 Å. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a 1-coordinate geometry to one Pb(1) atom. The Tc(1)-Pb(1) bond length is 2.37 Å. In the second Tc site, Tc(2) is bonded in a 1-coordinate geometry to one Ta(1) atom. Pb(1) is bonded in a distorted single-bond geometry to one Ta(1) and one Tc(1) atom.