data_AlIr2Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.76
_cell_length_b   2.76
_cell_length_c   8.81
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   119.12
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlIr2Rh
_chemical_formula_sum   'Al1 Ir2 Rh1'
_cell_volume   58.49
_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  0.4  0.0  0.06  1.0
  Ir  Ir2  1  0.4  0.0  0.75  1.0
  Rh  Rh3  1  0.0  0.0  0.41  1.0

data_AlIr2Rh
_symmetry_space_group_name_H-M   Cm
_cell_length_a   2.76
_cell_length_b   4.82
_cell_length_c   8.81
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   AlIr2Rh
_chemical_formula_sum   'Al2 Ir4 Rh2'
_cell_volume   116.99
_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  0.4  0.0  0.06  1.0
  Ir  Ir2  2  0.4  0.0  0.75  1.0
  Rh  Rh3  2  0.0  0.0  0.41  1.0

Al Ir Ir Rh
Al Ir Ir Rh 0 1 o o o 0 2 o o - 0 2 - o - 1 2 o o - 1 3 o o o 2 2 + + o 2 2 o + o 2 2 + o o 2 3 o o o 3 3 + + o 3 3 o + o 3 3 + o o 
Ir2RhAl crystallizes in the triclinic P1 space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 2-coordinate geometry to two equivalent Rh(1) and two equivalent Al(1) atoms. There is one shorter (3.21 Å) and one longer (3.45 Å) Ir(1)-Rh(1) bond length. There is one shorter (1.22 Å) and one longer (1.75 Å) Ir(1)-Al(1) bond length. In the second Ir site, Ir(2) is bonded in a 1-coordinate geometry to two equivalent Rh(1) and one Al(1) atom. There is one shorter (3.21 Å) and one longer (3.45 Å) Ir(2)-Rh(1) bond length. The Ir(2)-Al(1) bond length is 2.48 Å. Rh(1) is bonded in a 10-coordinate geometry to two equivalent Ir(1), two equivalent Ir(2), and six equivalent Rh(1) atoms. There are four shorter (2.76 Å) and two longer (2.79 Å) Rh(1)-Rh(1) bond lengths. Al(1) is bonded in a 2-coordinate geometry to one Ir(2) and two equivalent Ir(1) atoms.