Ru3Ir is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Ru(1) is bonded to eight equivalent Ru(1) and four equivalent Ir(1) atoms to form RuIr4Ru8 cuboctahedra that share corners with four equivalent Ir(1)Ru12 cuboctahedra, corners with fourteen equivalent Ru(1)Ir4Ru8 cuboctahedra, edges with six equivalent Ir(1)Ru12 cuboctahedra, edges with twelve equivalent Ru(1)Ir4Ru8 cuboctahedra, faces with four equivalent Ir(1)Ru12 cuboctahedra, and faces with sixteen equivalent Ru(1)Ir4Ru8 cuboctahedra. Ir(1) is bonded to twelve equivalent Ru(1) atoms to form IrRu12 cuboctahedra that share corners with six equivalent Ir(1)Ru12 cuboctahedra, corners with twelve equivalent Ru(1)Ir4Ru8 cuboctahedra, edges with eighteen equivalent Ru(1)Ir4Ru8 cuboctahedra, faces with eight equivalent Ir(1)Ru12 cuboctahedra, and faces with twelve equivalent Ru(1)Ir4Ru8 cuboctahedra.
Ru3Ir is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Ru(1) is bonded to eight equivalent Ru(1) and four equivalent Ir(1) atoms to form RuIr4Ru8 cuboctahedra that share corners with four equivalent Ir(1)Ru12 cuboctahedra, corners with fourteen equivalent Ru(1)Ir4Ru8 cuboctahedra, edges with six equivalent Ir(1)Ru12 cuboctahedra, edges with twelve equivalent Ru(1)Ir4Ru8 cuboctahedra, faces with four equivalent Ir(1)Ru12 cuboctahedra, and faces with sixteen equivalent Ru(1)Ir4Ru8 cuboctahedra. There are a spread of Ru(1)-Ru(1) bond distances ranging from 2.66-2.73 Å. There are two shorter (2.67 Å) and two longer (2.71 Å) Ru(1)-Ir(1) bond lengths. Ir(1) is bonded to twelve equivalent Ru(1) atoms to form IrRu12 cuboctahedra that share corners with six equivalent Ir(1)Ru12 cuboctahedra, corners with twelve equivalent Ru(1)Ir4Ru8 cuboctahedra, edges with eighteen equivalent Ru(1)Ir4Ru8 cuboctahedra, faces with eight equivalent Ir(1)Ru12 cuboctahedra, and faces with twelve equivalent Ru(1)Ir4Ru8 cuboctahedra.