data_TcBi2Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.35
_cell_length_b   3.35
_cell_length_c   9.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TcBi2Sb
_chemical_formula_sum   'Tc1 Bi2 Sb1'
_cell_volume   101.83
_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
  Tc  Tc3  1  0.0  0.0  0.0  1.0
  Bi  Bi0  1  0.68  0.68  0.71  1.0
  Bi  Bi1  1  0.68  0.68  0.36  1.0
  Sb  Sb2  1  0.0  0.0  0.54  1.0

data_TcBi2Sb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.74
_cell_length_b   4.74
_cell_length_c   9.07
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TcBi2Sb
_chemical_formula_sum   'Tc2 Bi4 Sb2'
_cell_volume   203.66
_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
  Tc  Tc0  2  0.0  0.0  0.0  1.0
  Bi  Bi1  2  0.18  0.5  0.36  1.0
  Bi  Bi2  2  0.18  0.5  0.71  1.0
  Sb  Sb3  2  0.0  0.0  0.54  1.0

Tc Bi Bi Sb
TcBi2Sb crystallizes in the monoclinic Cm space group. Tc(1) is bonded in a 8-coordinate geometry to four equivalent Tc(1), one Bi(2), and three equivalent Bi(1) atoms. All Tc(1)-Tc(1) bond lengths are 3.35 Å. The Tc(1)-Bi(2) bond length is 3.61 Å. There is one shorter (3.03 Å) and two longer (3.62 Å) Tc(1)-Bi(1) bond lengths. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 1-coordinate geometry to three equivalent Tc(1) and one Sb(1) atom. The Bi(1)-Sb(1) bond length is 2.22 Å. In the second Bi site, Bi(2) is bonded in a distorted single-bond geometry to one Tc(1) and one Sb(1) atom. The Bi(2)-Sb(1) bond length is 2.22 Å. Sb(1) is bonded in a distorted L-shaped geometry to one Bi(1) and one Bi(2) atom.