data_Al2CuIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.3
_cell_length_b   4.3
_cell_length_c   2.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2CuIr
_chemical_formula_sum   'Al2 Cu1 Ir1'
_cell_volume   54.29
_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  0.15  0.0  0.47  1.0
  Al  Al1  1  0.0  0.15  0.47  1.0
  Cu  Cu2  1  0.0  0.0  0.0  1.0
  Ir  Ir3  1  0.15  0.15  0.0  1.0

data_Al2CuIr
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.08
_cell_length_b   6.08
_cell_length_c   2.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Al2CuIr
_chemical_formula_sum   'Al4 Cu2 Ir2'
_cell_volume   108.58
_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
  Al  Al0  4  0.08  0.08  0.47  1.0
  Cu  Cu1  2  0.0  0.0  0.0  1.0
  Ir  Ir2  2  0.15  0.0  0.0  1.0

Al Al Cu Ir
Al2CuIr crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two dialuminium molecules and two CuIr clusters. In each CuIr cluster, Ir(1) is bonded in a single-bond geometry to one Cu(1) atom. The Ir(1)-Cu(1) bond length is 0.92 Å. Cu(1) is bonded in a single-bond geometry to one Ir(1) atom.