IrNi crystallizes in the trigonal R-3m space group. Ir(1) is bonded to six equivalent Ir(1) and six equivalent Ni(1) atoms to form distorted IrNi6Ir6 cuboctahedra that share corners with twelve equivalent Ir(1)Ni6Ir6 cuboctahedra, edges with twelve equivalent Ir(1)Ni6Ir6 cuboctahedra, edges with twelve equivalent Ni(1)Ni6Ir6 cuboctahedra, faces with six equivalent Ir(1)Ni6Ir6 cuboctahedra, and faces with twelve equivalent Ni(1)Ni6Ir6 cuboctahedra. Ni(1) is bonded to six equivalent Ir(1) and six equivalent Ni(1) atoms to form distorted NiNi6Ir6 cuboctahedra that share corners with twelve equivalent Ni(1)Ni6Ir6 cuboctahedra, edges with twelve equivalent Ir(1)Ni6Ir6 cuboctahedra, edges with twelve equivalent Ni(1)Ni6Ir6 cuboctahedra, faces with six equivalent Ni(1)Ni6Ir6 cuboctahedra, and faces with twelve equivalent Ir(1)Ni6Ir6 cuboctahedra.
IrNi crystallizes in the trigonal R-3m space group. Ir(1) is bonded to six equivalent Ir(1) and six equivalent Ni(1) atoms to form distorted IrNi6Ir6 cuboctahedra that share corners with twelve equivalent Ir(1)Ni6Ir6 cuboctahedra, edges with twelve equivalent Ir(1)Ni6Ir6 cuboctahedra, edges with twelve equivalent Ni(1)Ni6Ir6 cuboctahedra, faces with six equivalent Ir(1)Ni6Ir6 cuboctahedra, and faces with twelve equivalent Ni(1)Ni6Ir6 cuboctahedra. All Ir(1)-Ir(1) bond lengths are 2.66 Å. All Ir(1)-Ni(1) bond lengths are 2.57 Å. Ni(1) is bonded to six equivalent Ir(1) and six equivalent Ni(1) atoms to form distorted NiNi6Ir6 cuboctahedra that share corners with twelve equivalent Ni(1)Ni6Ir6 cuboctahedra, edges with twelve equivalent Ir(1)Ni6Ir6 cuboctahedra, edges with twelve equivalent Ni(1)Ni6Ir6 cuboctahedra, faces with six equivalent Ni(1)Ni6Ir6 cuboctahedra, and faces with twelve equivalent Ir(1)Ni6Ir6 cuboctahedra. All Ni(1)-Ni(1) bond lengths are 2.66 Å.