data_Tc2Bi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.65
_cell_length_b   4.65
_cell_length_c   6.39
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tc2Bi3
_chemical_formula_sum   'Tc2 Bi3'
_cell_volume   119.6
_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  0.32  0.34  0.82  1.0
  Tc  Tc4  1  0.0  0.68  0.56  1.0
  Bi  Bi0  1  0.0  0.0  0.0  1.0
  Bi  Bi1  1  0.32  0.34  0.26  1.0
  Bi  Bi2  1  0.0  0.68  0.13  1.0

data_Tc2Bi3
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.65
_cell_length_b   4.65
_cell_length_c   6.39
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Tc2Bi3
_chemical_formula_sum   'Tc2 Bi3'
_cell_volume   119.6
_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  Tc0  1  0.0  0.68  0.56  1.0
  Tc  Tc1  1  0.32  0.34  0.82  1.0
  Bi  Bi2  1  0.0  0.0  0.0  1.0
  Bi  Bi3  1  0.0  0.68  0.13  1.0
  Bi  Bi4  1  0.32  0.34  0.26  1.0

Tc Tc Bi Bi Bi
Tc2Bi3 crystallizes in the triclinic P1 space group. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a single-bond geometry to three equivalent Tc(2), one Bi(1), and two equivalent Bi(2) atoms. There are a spread of Tc(1)-Tc(2) bond distances ranging from 3.13-3.19 Å. The Tc(1)-Bi(1) bond length is 1.92 Å. There is one shorter (2.79 Å) and one longer (3.59 Å) Tc(1)-Bi(2) bond length. In the second Tc site, Tc(2) is bonded in a 8-coordinate geometry to three equivalent Tc(1), one Bi(1), one Bi(3), and three equivalent Bi(2) atoms. The Tc(2)-Bi(1) bond length is 3.15 Å. The Tc(2)-Bi(3) bond length is 2.79 Å. There are a spread of Tc(2)-Bi(2) bond distances ranging from 3.28-3.33 Å. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 2-coordinate geometry to one Tc(1), one Tc(2), one Bi(2), and one Bi(3) atom. The Bi(1)-Bi(2) bond length is 2.28 Å. The Bi(1)-Bi(3) bond length is 1.67 Å. In the second Bi site, Bi(2) is bonded in a 9-coordinate geometry to two equivalent Tc(1), three equivalent Tc(2), one Bi(1), and three equivalent Bi(3) atoms. There are a spread of Bi(2)-Bi(3) bond distances ranging from 2.79-2.85 Å. In the third Bi site, Bi(3) is bonded in a 1-coordinate geometry to one Tc(2), one Bi(1), and three equivalent Bi(2) atoms.