data_Ta2AlTc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.29
_cell_length_b   5.29
_cell_length_c   4.53
_cell_angle_alpha   113.96
_cell_angle_beta   113.96
_cell_angle_gamma   35.33
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2AlTc
_chemical_formula_sum   'Ta2 Al1 Tc1'
_cell_volume   66.34
_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  0.1  0.0  0.06  1.0
  Ta  Ta2  1  0.95  0.0  0.04  1.0
  Al  Al0  1  0.2  0.0  0.11  1.0
  Tc  Tc3  1  0.13  0.0  0.04  1.0

data_Ta2AlTc
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.21
_cell_length_b   4.53
_cell_length_c   5.29
_cell_angle_alpha   113.96
_cell_angle_beta   107.66
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2AlTc
_chemical_formula_sum   'Ta2 Al1 Tc1'
_cell_volume   66.34
_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  0.04  0.95  1.0
  Ta  Ta1  1  0.0  0.06  0.1  1.0
  Al  Al2  1  0.0  0.11  0.2  1.0
  Tc  Tc3  1  0.0  0.04  0.13  1.0

Ta Ta Al Tc
Ta Ta Al Tc 0 3 o o o 0 1 - o o 2 3 o o o 
Ta2TcAl crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Ta2TcAl cluster. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a single-bond geometry to one Ta(2) and one Tc(1) atom. The Ta(1)-Ta(2) bond length is 0.74 Å. The Ta(1)-Tc(1) bond length is 0.23 Å. In the second Ta site, Ta(2) is bonded in a single-bond geometry to one Ta(1) atom. Tc(1) is bonded in a single-bond geometry to one Ta(1) and one Al(1) atom. The Tc(1)-Al(1) bond length is 0.37 Å. Al(1) is bonded in a single-bond geometry to one Tc(1) atom.