data_TcTe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.28
_cell_length_b   7.28
_cell_length_c   7.28
_cell_angle_alpha   154.39
_cell_angle_beta   154.39
_cell_angle_gamma   36.54
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TcTe2
_chemical_formula_sum   'Tc1 Te2'
_cell_volume   72.07
_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  0.0  0.0  1.0
  Te  Te1  1  0.0  0.0  0.22  1.0
  Te  Te2  1  0.0  0.0  0.61  1.0

data_TcTe2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.57
_cell_length_b   4.57
_cell_length_c   7.28
_cell_angle_alpha   90.0
_cell_angle_beta   108.27
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TcTe2
_chemical_formula_sum   'Tc2 Te4'
_cell_volume   144.14
_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
  Te  Te1  2  0.0  0.0  0.39  1.0
  Te  Te2  2  0.0  0.0  0.78  1.0

Tc Te Te
TcTe2 crystallizes in the monoclinic Cm space group. Tc(1) is bonded in a distorted single-bond geometry to one Te(1) and one Te(2) atom. The Tc(1)-Te(1) bond length is 1.61 Å. The Tc(1)-Te(2) bond length is 2.85 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a single-bond geometry to one Tc(1) and one Te(2) atom. The Te(1)-Te(2) bond length is 2.82 Å. In the second Te site, Te(2) is bonded in a 6-coordinate geometry to one Tc(1), one Te(1), and four equivalent Te(2) atoms. All Te(2)-Te(2) bond lengths are 3.23 Å.