RuCu3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Ru(1) is bonded to twelve Cu(1,1) atoms to form RuCu12 cuboctahedra that share corners with six equivalent Ru(1)Cu12 cuboctahedra; corners with twelve Cu(1,1)Cu8Ru4 cuboctahedra; edges with eighteen Cu(1,1)Cu8Ru4 cuboctahedra; faces with eight equivalent Ru(1)Cu12 cuboctahedra; and faces with twelve Cu(1,1)Cu8Ru4 cuboctahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Ru(1) and eight equivalent Cu(1) atoms to form distorted CuCu8Ru4 cuboctahedra that share corners with four equivalent Ru(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Ru4 cuboctahedra; edges with six equivalent Ru(1)Cu12 cuboctahedra; edges with twelve equivalent Cu(1)Cu8Ru4 cuboctahedra; faces with four equivalent Ru(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1)Cu8Ru4 cuboctahedra. In the second Cu site, Cu(1) is bonded to four equivalent Ru(1) and eight Cu(1,1) atoms to form distorted CuCu8Ru4 cuboctahedra that share corners with four equivalent Ru(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Ru4 cuboctahedra; edges with six equivalent Ru(1)Cu12 cuboctahedra; edges with twelve Cu(1,1)Cu8Ru4 cuboctahedra; faces with four equivalent Ru(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1)Cu8Ru4 cuboctahedra.
RuCu3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Ru(1) is bonded to twelve Cu(1,1) atoms to form RuCu12 cuboctahedra that share corners with six equivalent Ru(1)Cu12 cuboctahedra; corners with twelve Cu(1,1)Cu8Ru4 cuboctahedra; edges with eighteen Cu(1,1)Cu8Ru4 cuboctahedra; faces with eight equivalent Ru(1)Cu12 cuboctahedra; and faces with twelve Cu(1,1)Cu8Ru4 cuboctahedra. There are six shorter (2.61 Å) and six longer (2.63 Å) Ru(1)-Cu(1,1) bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Ru(1) and eight equivalent Cu(1) atoms to form distorted CuCu8Ru4 cuboctahedra that share corners with four equivalent Ru(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Ru4 cuboctahedra; edges with six equivalent Ru(1)Cu12 cuboctahedra; edges with twelve equivalent Cu(1)Cu8Ru4 cuboctahedra; faces with four equivalent Ru(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1)Cu8Ru4 cuboctahedra. There are a spread of Cu(1)-Cu(1) bond distances ranging from 2.58-2.67 Å. In the second Cu site, Cu(1) is bonded to four equivalent Ru(1) and eight Cu(1,1) atoms to form distorted CuCu8Ru4 cuboctahedra that share corners with four equivalent Ru(1)Cu12 cuboctahedra; corners with fourteen Cu(1,1)Cu8Ru4 cuboctahedra; edges with six equivalent Ru(1)Cu12 cuboctahedra; edges with twelve Cu(1,1)Cu8Ru4 cuboctahedra; faces with four equivalent Ru(1)Cu12 cuboctahedra; and faces with sixteen Cu(1,1)Cu8Ru4 cuboctahedra. There are a spread of Cu(1)-Cu(1) bond distances ranging from 2.58-2.67 Å.