data_Ta2TcB
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.14
_cell_length_b   7.14
_cell_length_c   7.14
_cell_angle_alpha   25.28
_cell_angle_beta   25.28
_cell_angle_gamma   25.28
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2TcB
_chemical_formula_sum   'Ta2 Tc1 B1'
_cell_volume   58.48
_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
  Ta  Ta1  1  0.0  0.0  0.55  1.0
  Ta  Ta2  1  0.0  0.0  0.18  1.0
  Tc  Tc3  1  0.0  0.0  0.37  1.0
  B  B0  1  0.0  0.0  0.0  1.0

data_Ta2TcB
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.41
_cell_length_b   3.13
_cell_length_c   7.14
_cell_angle_alpha   90.0
_cell_angle_beta   104.64
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ta2TcB
_chemical_formula_sum   'Ta4 Tc2 B2'
_cell_volume   116.96
_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
  Ta  Ta0  2  -0.0  0.0  0.45  1.0
  Ta  Ta1  2  0.0  0.0  0.82  1.0
  Tc  Tc2  2  0.0  0.0  0.63  1.0
  B  B3  2  0.0  0.0  0.0  1.0

Ta Ta Tc B
Ta2TcB crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Ta2TcB clusters. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a single-bond geometry to one Tc(1) atom. The Ta(1)-Tc(1) bond length is 1.31 Å. In the second Ta site, Ta(2) is bonded in a linear geometry to one Tc(1) and one B(1) atom. The Ta(2)-Tc(1) bond length is 1.31 Å. The Ta(2)-B(1) bond length is 1.31 Å. Tc(1) is bonded in a linear geometry to one Ta(1) and one Ta(2) atom. B(1) is bonded in a single-bond geometry to one Ta(2) atom.