data_Ta2Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.04
_cell_length_b   3.04
_cell_length_c   6.09
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2Co
_chemical_formula_sum   'Ta2 Co1'
_cell_volume   48.67
_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  0.75  0.9  1.0
  Ta  Ta2  1  0.52  0.88  0.19  1.0
  Co  Co0  1  0.0  0.0  0.0  1.0

data_Ta2Co
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.04
_cell_length_b   3.04
_cell_length_c   6.09
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2Co
_chemical_formula_sum   'Ta2 Co1'
_cell_volume   48.67
_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  Ta0  1  0.0  0.75  0.9  1.0
  Ta  Ta1  1  0.52  0.88  0.19  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0

Ta Ta Co
Ta Ta Co 0 2 o + + 1 2 o + o 1 2 + + o 
Ta2Co crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Ta2Co cluster. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a single-bond geometry to one Co(1) atom. The Ta(1)-Co(1) bond length is 0.96 Å. In the second Ta site, Ta(2) is bonded in a 1-coordinate geometry to one Co(1) atom. The Ta(2)-Co(1) bond length is 1.75 Å. Co(1) is bonded in a 1-coordinate geometry to one Ta(1) and one Ta(2) atom.