Lu3Tm is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Lu(1) is bonded to eight equivalent Lu(1) and four equivalent Tm(1) atoms to form LuTm4Lu8 cuboctahedra that share corners with four equivalent Tm(1)Lu12 cuboctahedra, corners with fourteen equivalent Lu(1)Tm4Lu8 cuboctahedra, edges with six equivalent Tm(1)Lu12 cuboctahedra, edges with twelve equivalent Lu(1)Tm4Lu8 cuboctahedra, faces with four equivalent Tm(1)Lu12 cuboctahedra, and faces with sixteen equivalent Lu(1)Tm4Lu8 cuboctahedra. Tm(1) is bonded to twelve equivalent Lu(1) atoms to form TmLu12 cuboctahedra that share corners with six equivalent Tm(1)Lu12 cuboctahedra, corners with twelve equivalent Lu(1)Tm4Lu8 cuboctahedra, edges with eighteen equivalent Lu(1)Tm4Lu8 cuboctahedra, faces with eight equivalent Tm(1)Lu12 cuboctahedra, and faces with twelve equivalent Lu(1)Tm4Lu8 cuboctahedra.
Lu3Tm is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Lu(1) is bonded to eight equivalent Lu(1) and four equivalent Tm(1) atoms to form LuTm4Lu8 cuboctahedra that share corners with four equivalent Tm(1)Lu12 cuboctahedra, corners with fourteen equivalent Lu(1)Tm4Lu8 cuboctahedra, edges with six equivalent Tm(1)Lu12 cuboctahedra, edges with twelve equivalent Lu(1)Tm4Lu8 cuboctahedra, faces with four equivalent Tm(1)Lu12 cuboctahedra, and faces with sixteen equivalent Lu(1)Tm4Lu8 cuboctahedra. There are a spread of Lu(1)-Lu(1) bond distances ranging from 3.40-3.54 Å. There are two shorter (3.41 Å) and two longer (3.53 Å) Lu(1)-Tm(1) bond lengths. Tm(1) is bonded to twelve equivalent Lu(1) atoms to form TmLu12 cuboctahedra that share corners with six equivalent Tm(1)Lu12 cuboctahedra, corners with twelve equivalent Lu(1)Tm4Lu8 cuboctahedra, edges with eighteen equivalent Lu(1)Tm4Lu8 cuboctahedra, faces with eight equivalent Tm(1)Lu12 cuboctahedra, and faces with twelve equivalent Lu(1)Tm4Lu8 cuboctahedra.