Y2Ru3Co crystallizes in the trigonal R-3m space group. Y(1) is bonded in a 12-coordinate geometry to nine equivalent Ru(1) and three equivalent Co(1) atoms. Ru(1) is bonded to six equivalent Y(1), four equivalent Ru(1), and two equivalent Co(1) atoms to form RuY6Co2Ru4 cuboctahedra that share corners with four equivalent Co(1)Y6Ru6 cuboctahedra, corners with fourteen equivalent Ru(1)Y6Co2Ru4 cuboctahedra, edges with six equivalent Ru(1)Y6Co2Ru4 cuboctahedra, faces with six equivalent Co(1)Y6Ru6 cuboctahedra, and faces with twelve equivalent Ru(1)Y6Co2Ru4 cuboctahedra. Co(1) is bonded to six equivalent Y(1) and six equivalent Ru(1) atoms to form CoY6Ru6 cuboctahedra that share corners with six equivalent Co(1)Y6Ru6 cuboctahedra, corners with twelve equivalent Ru(1)Y6Co2Ru4 cuboctahedra, edges with six equivalent Co(1)Y6Ru6 cuboctahedra, and faces with eighteen equivalent Ru(1)Y6Co2Ru4 cuboctahedra.
Y2Ru3Co crystallizes in the trigonal R-3m space group. Y(1) is bonded in a 12-coordinate geometry to nine equivalent Ru(1) and three equivalent Co(1) atoms. All Y(1)-Ru(1) bond lengths are 3.08 Å. All Y(1)-Co(1) bond lengths are 3.09 Å. Ru(1) is bonded to six equivalent Y(1), four equivalent Ru(1), and two equivalent Co(1) atoms to form RuY6Co2Ru4 cuboctahedra that share corners with four equivalent Co(1)Y6Ru6 cuboctahedra, corners with fourteen equivalent Ru(1)Y6Co2Ru4 cuboctahedra, edges with six equivalent Ru(1)Y6Co2Ru4 cuboctahedra, faces with six equivalent Co(1)Y6Ru6 cuboctahedra, and faces with twelve equivalent Ru(1)Y6Co2Ru4 cuboctahedra. All Ru(1)-Ru(1) bond lengths are 2.64 Å. Both Ru(1)-Co(1) bond lengths are 2.62 Å. Co(1) is bonded to six equivalent Y(1) and six equivalent Ru(1) atoms to form CoY6Ru6 cuboctahedra that share corners with six equivalent Co(1)Y6Ru6 cuboctahedra, corners with twelve equivalent Ru(1)Y6Co2Ru4 cuboctahedra, edges with six equivalent Co(1)Y6Ru6 cuboctahedra, and faces with eighteen equivalent Ru(1)Y6Co2Ru4 cuboctahedra.