data_AlIr2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.79
_cell_length_b   8.79
_cell_length_c   8.79
_cell_angle_alpha   18.32
_cell_angle_beta   18.32
_cell_angle_gamma   18.32
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlIr2Pt
_chemical_formula_sum   'Al1 Ir2 Pt1'
_cell_volume   58.67
_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
  Ir  Ir1  1  0.0  0.0  0.29  1.0
  Ir  Ir2  1  0.0  0.0  0.64  1.0
  Pt  Pt3  1  0.0  0.0  0.96  1.0

data_AlIr2Pt
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.85
_cell_length_b   2.8
_cell_length_c   8.79
_cell_angle_alpha   90.0
_cell_angle_beta   100.59
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   AlIr2Pt
_chemical_formula_sum   'Al2 Ir4 Pt2'
_cell_volume   117.35
_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  2  0.0  0.0  0.0  1.0
  Ir  Ir1  2  0.0  0.0  0.71  1.0
  Ir  Ir2  2  0.0  0.0  0.36  1.0
  Pt  Pt3  2  0.0  0.0  0.04  1.0

Al Ir Ir Pt
Ir2PtAl crystallizes in the monoclinic Cm space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a single-bond geometry to one Ir(2) and one Al(1) atom. The Ir(1)-Ir(2) bond length is 3.09 Å. The Ir(1)-Al(1) bond length is 2.54 Å. In the second Ir site, Ir(2) is bonded to one Ir(1), six equivalent Ir(2), and one Pt(1) atom to form a mixture of distorted edge and corner-sharing IrIr7Pt hexagonal bipyramids. All Ir(2)-Ir(2) bond lengths are 2.80 Å. The Ir(2)-Pt(1) bond length is 2.85 Å. Pt(1) is bonded in a single-bond geometry to one Ir(2) and one Al(1) atom. The Pt(1)-Al(1) bond length is 0.31 Å. Al(1) is bonded in a single-bond geometry to one Ir(1) and one Pt(1) atom.