data_IrRh3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.08
_cell_length_b   3.08
_cell_length_c   6.17
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   IrRh3
_chemical_formula_sum   'Ir1 Rh3'
_cell_volume   58.65
_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
  Ir  Ir0  1  0.0  0.0  0.08  1.0
  Rh  Rh1  1  0.0  0.0  0.0  1.0
  Rh  Rh2  1  0.54  0.54  0.63  1.0
  Rh  Rh3  1  0.54  0.54  0.54  1.0

data_IrRh3
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.36
_cell_length_b   4.36
_cell_length_c   6.17
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   IrRh3
_chemical_formula_sum   'Ir2 Rh6'
_cell_volume   117.29
_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
  Ir  Ir0  2  0.0  0.0  0.08  1.0
  Rh  Rh1  2  0.0  0.0  0.0  1.0
  Rh  Rh2  2  0.04  0.5  0.54  1.0
  Rh  Rh3  2  0.04  0.5  0.63  1.0

Ir Rh Rh Rh
Ir Rh Rh Rh 0 1 o o o 2 3 o o o 
IrRh(Rh)2 is alpha carbon monoxide-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two IrRh clusters and two Rh clusters. In each IrRh cluster, Ir(1) is bonded in a single-bond geometry to one Rh(1) atom. The Ir(1)-Rh(1) bond length is 0.52 Å. Rh(1) is bonded in a single-bond geometry to one Ir(1) atom. In each Rh cluster, there are two inequivalent Rh sites. In the first Rh site, Rh(2) is bonded in a single-bond geometry to one Rh(3) atom. The Rh(2)-Rh(3) bond length is 0.52 Å. In the second Rh site, Rh(3) is bonded in a single-bond geometry to one Rh(2) atom.