data_SiTcBi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.63
_cell_length_b   9.63
_cell_length_c   9.63
_cell_angle_alpha   20.08
_cell_angle_beta   20.08
_cell_angle_gamma   20.08
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiTcBi2
_chemical_formula_sum   'Si1 Tc1 Bi2'
_cell_volume   92.1
_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
  Si  Si2  1  0.0  0.0  0.0  1.0
  Tc  Tc3  1  0.0  0.0  0.15  1.0
  Bi  Bi0  1  0.0  0.0  0.51  1.0
  Bi  Bi1  1  0.0  0.0  0.78  1.0

data_SiTcBi2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.82
_cell_length_b   3.36
_cell_length_c   9.63
_cell_angle_alpha   90.0
_cell_angle_beta   101.62
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiTcBi2
_chemical_formula_sum   'Si2 Tc2 Bi4'
_cell_volume   184.21
_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
  Si  Si0  2  0.0  0.0  0.0  1.0
  Tc  Tc1  2  0.0  0.0  0.85  1.0
  Bi  Bi2  2  0.0  0.0  0.22  1.0
  Bi  Bi3  2  0.0  0.0  0.49  1.0

Si Tc Bi Bi
TcSiBi2 crystallizes in the monoclinic Cm space group. Tc(1) is bonded in a single-bond geometry to one Si(1) and one Bi(1) atom. The Tc(1)-Si(1) bond length is 1.42 Å. The Tc(1)-Bi(1) bond length is 3.51 Å. Si(1) is bonded in a linear geometry to one Tc(1) and one Bi(2) atom. The Si(1)-Bi(2) bond length is 2.09 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one Tc(1), one Bi(2), and six equivalent Bi(1) atoms to form a mixture of distorted corner and edge-sharing BiTcBi7 hexagonal bipyramids. The Bi(1)-Bi(2) bond length is 2.61 Å. All Bi(1)-Bi(1) bond lengths are 3.36 Å. In the second Bi site, Bi(2) is bonded in a distorted single-bond geometry to one Si(1) and one Bi(1) atom.