ReIr3 crystallizes in the trigonal R-3m space group. Re(1) is bonded to six equivalent Re(1) and six equivalent Ir(1) atoms to form ReRe6Ir6 cuboctahedra that share corners with six equivalent Re(1)Re6Ir6 cuboctahedra, corners with six equivalent Ir(2)Ir12 cuboctahedra, edges with six equivalent Re(1)Re6Ir6 cuboctahedra, edges with six equivalent Ir(2)Ir12 cuboctahedra, edges with twelve equivalent Ir(1)Re3Ir9 cuboctahedra, faces with six equivalent Re(1)Re6Ir6 cuboctahedra, and faces with twelve equivalent Ir(1)Re3Ir9 cuboctahedra. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded to three equivalent Re(1), three equivalent Ir(2), and six equivalent Ir(1) atoms to form IrRe3Ir9 cuboctahedra that share corners with twelve equivalent Ir(1)Re3Ir9 cuboctahedra, edges with six equivalent Re(1)Re6Ir6 cuboctahedra, edges with six equivalent Ir(2)Ir12 cuboctahedra, edges with twelve equivalent Ir(1)Re3Ir9 cuboctahedra, faces with six equivalent Re(1)Re6Ir6 cuboctahedra, faces with six equivalent Ir(2)Ir12 cuboctahedra, and faces with six equivalent Ir(1)Re3Ir9 cuboctahedra. In the second Ir site, Ir(2) is bonded to six equivalent Ir(1) and six equivalent Ir(2) atoms to form IrIr12 cuboctahedra that share corners with six equivalent Re(1)Re6Ir6 cuboctahedra, corners with six equivalent Ir(2)Ir12 cuboctahedra, edges with six equivalent Re(1)Re6Ir6 cuboctahedra, edges with six equivalent Ir(2)Ir12 cuboctahedra, edges with twelve equivalent Ir(1)Re3Ir9 cuboctahedra, faces with six equivalent Ir(2)Ir12 cuboctahedra, and faces with twelve equivalent Ir(1)Re3Ir9 cuboctahedra.
ReIr3 crystallizes in the trigonal R-3m space group. Re(1) is bonded to six equivalent Re(1) and six equivalent Ir(1) atoms to form ReRe6Ir6 cuboctahedra that share corners with six equivalent Re(1)Re6Ir6 cuboctahedra, corners with six equivalent Ir(2)Ir12 cuboctahedra, edges with six equivalent Re(1)Re6Ir6 cuboctahedra, edges with six equivalent Ir(2)Ir12 cuboctahedra, edges with twelve equivalent Ir(1)Re3Ir9 cuboctahedra, faces with six equivalent Re(1)Re6Ir6 cuboctahedra, and faces with twelve equivalent Ir(1)Re3Ir9 cuboctahedra. All Re(1)-Re(1) bond lengths are 2.74 Å. All Re(1)-Ir(1) bond lengths are 2.72 Å. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded to three equivalent Re(1), three equivalent Ir(2), and six equivalent Ir(1) atoms to form IrRe3Ir9 cuboctahedra that share corners with twelve equivalent Ir(1)Re3Ir9 cuboctahedra, edges with six equivalent Re(1)Re6Ir6 cuboctahedra, edges with six equivalent Ir(2)Ir12 cuboctahedra, edges with twelve equivalent Ir(1)Re3Ir9 cuboctahedra, faces with six equivalent Re(1)Re6Ir6 cuboctahedra, faces with six equivalent Ir(2)Ir12 cuboctahedra, and faces with six equivalent Ir(1)Re3Ir9 cuboctahedra. All Ir(1)-Ir(2) bond lengths are 2.78 Å. All Ir(1)-Ir(1) bond lengths are 2.74 Å. In the second Ir site, Ir(2) is bonded to six equivalent Ir(1) and six equivalent Ir(2) atoms to form IrIr12 cuboctahedra that share corners with six equivalent Re(1)Re6Ir6 cuboctahedra, corners with six equivalent Ir(2)Ir12 cuboctahedra, edges with six equivalent Re(1)Re6Ir6 cuboctahedra, edges with six equivalent Ir(2)Ir12 cuboctahedra, edges with twelve equivalent Ir(1)Re3Ir9 cuboctahedra, faces with six equivalent Ir(2)Ir12 cuboctahedra, and faces with twelve equivalent Ir(1)Re3Ir9 cuboctahedra. All Ir(2)-Ir(2) bond lengths are 2.74 Å.