data_Y2AlCu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.47
_cell_length_b   4.36
_cell_length_c   6.2
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y2AlCu
_chemical_formula_sum   'Y2 Al1 Cu1'
_cell_volume   93.85
_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
  Y  Y2  1  0.0  0.0  0.96  1.0
  Y  Y3  1  0.74  0.18  0.85  1.0
  Al  Al0  1  0.0  0.0  0.99  1.0
  Cu  Cu1  1  0.74  0.18  0.71  1.0

data_Y2AlCu
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.47
_cell_length_b   4.36
_cell_length_c   6.2
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y2AlCu
_chemical_formula_sum   'Y2 Al1 Cu1'
_cell_volume   93.85
_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
  Y  Y0  1  0.0  0.0  0.96  1.0
  Y  Y1  1  0.74  0.18  0.85  1.0
  Al  Al2  1  0.0  0.0  0.99  1.0
  Cu  Cu3  1  0.74  0.18  0.71  1.0

Y Y Al Cu
YCuYAl crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one 12635-56-2 molecule and one YCu cluster. In the YCu cluster, Y(2) is bonded in a single-bond geometry to one Cu(1) atom. The Y(2)-Cu(1) bond length is 0.87 Å. Cu(1) is bonded in a single-bond geometry to one Y(2) atom.