Cu3Rh is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Rh(1) is bonded to twelve Cu(1,1,1) atoms to form RhCu12 cuboctahedra that share corners with six equivalent Rh(1)Cu12 cuboctahedra; corners with twelve Cu(1,1)Cu8Rh4 cuboctahedra; edges with eighteen Cu(1,1,1)Cu8Rh4 cuboctahedra; faces with eight equivalent Rh(1)Cu12 cuboctahedra; and faces with twelve Cu(1,1,1)Cu8Rh4 cuboctahedra. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Rh(1) and eight Cu(1,1,1) atoms to form distorted CuCu8Rh4 cuboctahedra that share corners with four equivalent Rh(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Rh4 cuboctahedra; edges with six equivalent Rh(1)Cu12 cuboctahedra; edges with twelve Cu(1,1,1)Cu8Rh4 cuboctahedra; faces with four equivalent Rh(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1,1)Cu8Rh4 cuboctahedra. In the second Cu site, Cu(1) is bonded to four equivalent Rh(1) and eight Cu(1,1) atoms to form distorted CuCu8Rh4 cuboctahedra that share corners with four equivalent Rh(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Rh4 cuboctahedra; edges with six equivalent Rh(1)Cu12 cuboctahedra; edges with twelve Cu(1,1)Cu8Rh4 cuboctahedra; faces with four equivalent Rh(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1,1)Cu8Rh4 cuboctahedra. In the third Cu site, Cu(1) is bonded to four equivalent Rh(1) and eight Cu(1,1,1) atoms to form distorted CuCu8Rh4 cuboctahedra that share corners with four equivalent Rh(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Rh4 cuboctahedra; edges with six equivalent Rh(1)Cu12 cuboctahedra; edges with twelve Cu(1,1,1)Cu8Rh4 cuboctahedra; faces with four equivalent Rh(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1,1)Cu8Rh4 cuboctahedra.
Cu3Rh is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Rh(1) is bonded to twelve Cu(1,1,1) atoms to form RhCu12 cuboctahedra that share corners with six equivalent Rh(1)Cu12 cuboctahedra; corners with twelve Cu(1,1)Cu8Rh4 cuboctahedra; edges with eighteen Cu(1,1,1)Cu8Rh4 cuboctahedra; faces with eight equivalent Rh(1)Cu12 cuboctahedra; and faces with twelve Cu(1,1,1)Cu8Rh4 cuboctahedra. All Rh(1)-Cu(1,1,1) bond lengths are 2.59 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Rh(1) and eight Cu(1,1,1) atoms to form distorted CuCu8Rh4 cuboctahedra that share corners with four equivalent Rh(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Rh4 cuboctahedra; edges with six equivalent Rh(1)Cu12 cuboctahedra; edges with twelve Cu(1,1,1)Cu8Rh4 cuboctahedra; faces with four equivalent Rh(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1,1)Cu8Rh4 cuboctahedra. There are a spread of Cu(1)-Cu(1,1,1) bond distances ranging from 2.55-2.63 Å. In the second Cu site, Cu(1) is bonded to four equivalent Rh(1) and eight Cu(1,1) atoms to form distorted CuCu8Rh4 cuboctahedra that share corners with four equivalent Rh(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Rh4 cuboctahedra; edges with six equivalent Rh(1)Cu12 cuboctahedra; edges with twelve Cu(1,1)Cu8Rh4 cuboctahedra; faces with four equivalent Rh(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1,1)Cu8Rh4 cuboctahedra. Both Cu(1)-Cu(1) bond lengths are 2.56 Å. In the third Cu site, Cu(1) is bonded to four equivalent Rh(1) and eight Cu(1,1,1) atoms to form distorted CuCu8Rh4 cuboctahedra that share corners with four equivalent Rh(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Rh4 cuboctahedra; edges with six equivalent Rh(1)Cu12 cuboctahedra; edges with twelve Cu(1,1,1)Cu8Rh4 cuboctahedra; faces with four equivalent Rh(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1,1)Cu8Rh4 cuboctahedra. There is one shorter (2.55 Å) and one longer (2.63 Å) Cu(1)-Cu(1) bond length.