LuYb3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Lu(1) is bonded to twelve equivalent Yb(1) atoms to form LuYb12 cuboctahedra that share corners with six equivalent Lu(1)Yb12 cuboctahedra, corners with twelve equivalent Yb(1)Yb8Lu4 cuboctahedra, edges with eighteen equivalent Yb(1)Yb8Lu4 cuboctahedra, faces with eight equivalent Lu(1)Yb12 cuboctahedra, and faces with twelve equivalent Yb(1)Yb8Lu4 cuboctahedra. Yb(1) is bonded to four equivalent Lu(1) and eight equivalent Yb(1) atoms to form YbYb8Lu4 cuboctahedra that share corners with four equivalent Lu(1)Yb12 cuboctahedra, corners with fourteen equivalent Yb(1)Yb8Lu4 cuboctahedra, edges with six equivalent Lu(1)Yb12 cuboctahedra, edges with twelve equivalent Yb(1)Yb8Lu4 cuboctahedra, faces with four equivalent Lu(1)Yb12 cuboctahedra, and faces with sixteen equivalent Yb(1)Yb8Lu4 cuboctahedra.
LuYb3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Lu(1) is bonded to twelve equivalent Yb(1) atoms to form LuYb12 cuboctahedra that share corners with six equivalent Lu(1)Yb12 cuboctahedra, corners with twelve equivalent Yb(1)Yb8Lu4 cuboctahedra, edges with eighteen equivalent Yb(1)Yb8Lu4 cuboctahedra, faces with eight equivalent Lu(1)Yb12 cuboctahedra, and faces with twelve equivalent Yb(1)Yb8Lu4 cuboctahedra. There are six shorter (3.69 Å) and six longer (3.73 Å) Lu(1)-Yb(1) bond lengths. Yb(1) is bonded to four equivalent Lu(1) and eight equivalent Yb(1) atoms to form YbYb8Lu4 cuboctahedra that share corners with four equivalent Lu(1)Yb12 cuboctahedra, corners with fourteen equivalent Yb(1)Yb8Lu4 cuboctahedra, edges with six equivalent Lu(1)Yb12 cuboctahedra, edges with twelve equivalent Yb(1)Yb8Lu4 cuboctahedra, faces with four equivalent Lu(1)Yb12 cuboctahedra, and faces with sixteen equivalent Yb(1)Yb8Lu4 cuboctahedra. There are a spread of Yb(1)-Yb(1) bond distances ranging from 3.62-3.83 Å.