data_TcB2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.06
_cell_length_b   4.06
_cell_length_c   4.06
_cell_angle_alpha   140.6
_cell_angle_beta   140.6
_cell_angle_gamma   56.95
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TcB2
_chemical_formula_sum   'Tc1 B2'
_cell_volume   26.8
_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  Tc2  1  0.0  0.0  0.0  1.0
  B  B0  1  0.0  0.0  0.9  1.0
  B  B1  1  0.0  0.0  0.24  1.0

data_TcB2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.87
_cell_length_b   3.87
_cell_length_c   4.06
_cell_angle_alpha   90.0
_cell_angle_beta   118.47
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TcB2
_chemical_formula_sum   'Tc2 B4'
_cell_volume   53.59
_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
  B  B1  2  0.24  0.0  0.24  1.0
  B  B2  2  0.4  0.5  0.9  1.0

Tc B B
Tc B B 0 1 o o - 0 2 o o o 
TcB2 is Cyanogen Chloride-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two TcB2 clusters. Tc(1) is bonded in a linear geometry to one B(1) and one B(2) atom. The Tc(1)-B(1) bond length is 0.39 Å. The Tc(1)-B(2) bond length is 0.97 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a single-bond geometry to one Tc(1) atom. In the second B site, B(2) is bonded in a single-bond geometry to one Tc(1) atom.