ReIr crystallizes in the hexagonal P-6m2 space group. Re(1) is bonded to six equivalent Re(1) and six equivalent Ir(1) atoms to form distorted ReRe6Ir6 cuboctahedra that share corners with eighteen equivalent Re(1)Re6Ir6 cuboctahedra, edges with six equivalent Re(1)Re6Ir6 cuboctahedra, edges with twelve equivalent Ir(1)Re6Ir6 cuboctahedra, faces with eight equivalent Re(1)Re6Ir6 cuboctahedra, and faces with twelve equivalent Ir(1)Re6Ir6 cuboctahedra. Ir(1) is bonded to six equivalent Re(1) and six equivalent Ir(1) atoms to form distorted IrRe6Ir6 cuboctahedra that share corners with eighteen equivalent Ir(1)Re6Ir6 cuboctahedra, edges with six equivalent Ir(1)Re6Ir6 cuboctahedra, edges with twelve equivalent Re(1)Re6Ir6 cuboctahedra, faces with eight equivalent Ir(1)Re6Ir6 cuboctahedra, and faces with twelve equivalent Re(1)Re6Ir6 cuboctahedra.
ReIr crystallizes in the hexagonal P-6m2 space group. Re(1) is bonded to six equivalent Re(1) and six equivalent Ir(1) atoms to form distorted ReRe6Ir6 cuboctahedra that share corners with eighteen equivalent Re(1)Re6Ir6 cuboctahedra, edges with six equivalent Re(1)Re6Ir6 cuboctahedra, edges with twelve equivalent Ir(1)Re6Ir6 cuboctahedra, faces with eight equivalent Re(1)Re6Ir6 cuboctahedra, and faces with twelve equivalent Ir(1)Re6Ir6 cuboctahedra. All Re(1)-Re(1) bond lengths are 2.75 Å. All Re(1)-Ir(1) bond lengths are 2.71 Å. Ir(1) is bonded to six equivalent Re(1) and six equivalent Ir(1) atoms to form distorted IrRe6Ir6 cuboctahedra that share corners with eighteen equivalent Ir(1)Re6Ir6 cuboctahedra, edges with six equivalent Ir(1)Re6Ir6 cuboctahedra, edges with twelve equivalent Re(1)Re6Ir6 cuboctahedra, faces with eight equivalent Ir(1)Re6Ir6 cuboctahedra, and faces with twelve equivalent Re(1)Re6Ir6 cuboctahedra. All Ir(1)-Ir(1) bond lengths are 2.75 Å.