data_AlCu2Tc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.59
_cell_length_b   4.59
_cell_length_c   4.59
_cell_angle_alpha   131.61
_cell_angle_beta   131.61
_cell_angle_gamma   70.85
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlCu2Tc
_chemical_formula_sum   'Al1 Cu2 Tc1'
_cell_volume   53.05
_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
  Al  Al0  1  0.0  0.0  0.0  1.0
  Cu  Cu1  1  0.88  0.0  0.87  1.0
  Cu  Cu2  1  0.0  0.0  0.74  1.0
  Tc  Tc3  1  0.0  0.88  0.87  1.0

data_AlCu2Tc
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.76
_cell_length_b   3.76
_cell_length_c   4.59
_cell_angle_alpha   114.2
_cell_angle_beta   114.2
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlCu2Tc
_chemical_formula_sum   'Al1 Cu2 Tc1'
_cell_volume   53.05
_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
  Al  Al0  1  0.0  0.0  0.0  1.0
  Tc  Tc1  1  0.01  0.88  0.01  1.0
  Cu  Cu2  1  0.13  0.0  0.01  1.0
  Cu  Cu3  1  0.26  0.0  0.26  1.0

Al Cu Cu Tc
Al Cu Cu Tc 0 1 - o - 0 3 o - - 0 2 o o - 1 2 + o o 2 3 o - o 
TcCu2Al is Indium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one TcCu2Al cluster. Tc(1) is bonded in a single-bond geometry to one Cu(2) and one Al(1) atom. The Tc(1)-Cu(2) bond length is 1.03 Å. The Tc(1)-Al(1) bond length is 0.47 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a single-bond geometry to one Cu(2) and one Al(1) atom. The Cu(1)-Cu(2) bond length is 1.03 Å. The Cu(1)-Al(1) bond length is 0.47 Å. In the second Cu site, Cu(2) is bonded in a 2-coordinate geometry to one Tc(1) and one Cu(1) atom. Al(1) is bonded in an L-shaped geometry to one Tc(1) and one Cu(1) atom.