data_TaCo2Tc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.69
_cell_length_b   2.69
_cell_length_c   7.35
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaCo2Tc
_chemical_formula_sum   'Ta1 Co2 Tc1'
_cell_volume   53.06
_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  Ta2  1  0.0  0.0  0.67  1.0
  Co  Co0  1  0.34  0.34  0.74  1.0
  Co  Co1  1  0.34  0.34  0.61  1.0
  Tc  Tc3  1  0.0  0.0  0.0  1.0

data_TaCo2Tc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.8
_cell_length_b   3.8
_cell_length_c   7.35
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   TaCo2Tc
_chemical_formula_sum   'Ta2 Co4 Tc2'
_cell_volume   106.11
_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  0.67  1.0
  Co  Co1  2  0.34  0.0  0.61  1.0
  Co  Co2  2  0.34  0.0  0.74  1.0
  Tc  Tc3  2  0.0  0.0  0.0  1.0

Ta Co Co Tc
TaTcCo2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two TaTcCo2 clusters. Ta(1) is bonded in a 2-coordinate geometry to one Tc(1), one Co(1), and one Co(2) atom. The Ta(1)-Tc(1) bond length is 2.40 Å. The Ta(1)-Co(1) bond length is 1.40 Å. The Ta(1)-Co(2) bond length is 1.40 Å. Tc(1) is bonded in a 2-coordinate geometry to one Ta(1) and one Co(1) atom. The Tc(1)-Co(1) bond length is 2.31 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 2-coordinate geometry to one Ta(1), one Tc(1), and one Co(2) atom. The Co(1)-Co(2) bond length is 1.00 Å. In the second Co site, Co(2) is bonded in a 2-coordinate geometry to one Ta(1) and one Co(1) atom.