data_Al2IrPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.4
_cell_length_b   4.4
_cell_length_c   2.97
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   98.08
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2IrPt
_chemical_formula_sum   'Al2 Ir1 Pt1'
_cell_volume   56.9
_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  0.44  0.34  0.48  1.0
  Al  Al1  1  0.44  0.66  0.48  1.0
  Ir  Ir2  1  0.0  0.0  0.0  1.0
  Pt  Pt3  1  0.88  0.0  0.0  1.0

data_Al2IrPt
_symmetry_space_group_name_H-M   Pm
_cell_length_a   4.4
_cell_length_b   2.97
_cell_length_c   4.4
_cell_angle_alpha   90.0
_cell_angle_beta   98.08
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   6
_chemical_formula_structural   Al2IrPt
_chemical_formula_sum   'Al2 Ir1 Pt1'
_cell_volume   56.9
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '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  0.44  0.5  0.34  1.0
  Al  Al1  1  0.44  0.5  0.66  1.0
  Ir  Ir2  1  0.0  0.0  0.0  1.0
  Pt  Pt3  1  0.88  0.0  0.0  1.0

Al Al Ir Pt
IrPtAl2 crystallizes in the triclinic P1 space group. Ir(1) is bonded in a single-bond geometry to one Pt(1), two equivalent Al(1), and two equivalent Al(2) atoms. The Ir(1)-Pt(1) bond length is 0.51 Å. There is one shorter (2.69 Å) and one longer (2.75 Å) Ir(1)-Al(1) bond length. There is one shorter (2.98 Å) and one longer (3.03 Å) Ir(1)-Al(2) bond length. Pt(1) is bonded in a distorted single-bond geometry to one Ir(1), two equivalent Al(1), and two equivalent Al(2) atoms. There is one shorter (2.98 Å) and one longer (3.03 Å) Pt(1)-Al(1) bond length. There is one shorter (2.69 Å) and one longer (2.75 Å) Pt(1)-Al(2) bond length. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to two equivalent Ir(1), two equivalent Pt(1), and one Al(2) atom. The Al(1)-Al(2) bond length is 1.42 Å. In the second Al site, Al(2) is bonded in a 5-coordinate geometry to two equivalent Ir(1), two equivalent Pt(1), and one Al(1) atom.