The structure described by IrRh is alpha La-derived structured and crystallizes in the trigonal R-3m space group. Ir(1) is bonded to six equivalent Ir(1) and six equivalent Rh(1) atoms to form IrIr6Rh6 cuboctahedra that share corners with twelve equivalent Ir(1)Ir6Rh6 cuboctahedra, edges with twelve equivalent Ir(1)Ir6Rh6 cuboctahedra, edges with twelve equivalent Rh(1)Ir6Rh6 cuboctahedra, faces with six equivalent Ir(1)Ir6Rh6 cuboctahedra, and faces with twelve equivalent Rh(1)Ir6Rh6 cuboctahedra. Rh(1) is bonded to six equivalent Ir(1) and six equivalent Rh(1) atoms to form RhIr6Rh6 cuboctahedra that share corners with twelve equivalent Rh(1)Ir6Rh6 cuboctahedra, edges with twelve equivalent Ir(1)Ir6Rh6 cuboctahedra, edges with twelve equivalent Rh(1)Ir6Rh6 cuboctahedra, faces with six equivalent Rh(1)Ir6Rh6 cuboctahedra, and faces with twelve equivalent Ir(1)Ir6Rh6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_IrRh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.709
_cell_length_b   2.709
_cell_length_c   4.687
_cell_angle_alpha   73.202
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   28.075
_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  0.000  0.000  0.000  1.0
  Rh  Rh1  1  0.500  0.000  0.500  1.0
[/CIF]
.
The structure described by IrRh is alpha La-derived structured and crystallizes in the trigonal R-3m space group. Ir(1) is bonded to six equivalent Ir(1) and six equivalent Rh(1) atoms to form IrIr6Rh6 cuboctahedra that share corners with twelve equivalent Ir(1)Ir6Rh6 cuboctahedra, edges with twelve equivalent Ir(1)Ir6Rh6 cuboctahedra, edges with twelve equivalent Rh(1)Ir6Rh6 cuboctahedra, faces with six equivalent Ir(1)Ir6Rh6 cuboctahedra, and faces with twelve equivalent Rh(1)Ir6Rh6 cuboctahedra. Rh(1) is bonded to six equivalent Ir(1) and six equivalent Rh(1) atoms to form RhIr6Rh6 cuboctahedra that share corners with twelve equivalent Rh(1)Ir6Rh6 cuboctahedra, edges with twelve equivalent Ir(1)Ir6Rh6 cuboctahedra, edges with twelve equivalent Rh(1)Ir6Rh6 cuboctahedra, faces with six equivalent Rh(1)Ir6Rh6 cuboctahedra, and faces with twelve equivalent Ir(1)Ir6Rh6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_IrRh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.709
_cell_length_b   2.709
_cell_length_c   4.687
_cell_angle_alpha   73.202
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   28.075
_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  0.000  0.000  0.000  1.0
  Rh  Rh1  1  0.500  0.000  0.500  1.0
[/CIF]
.