Pu3Tm is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Pu(1) is bonded to eight equivalent Pu(1) and four equivalent Tm(1) atoms to form PuTm4Pu8 cuboctahedra that share corners with four equivalent Tm(1)Pu12 cuboctahedra, corners with fourteen equivalent Pu(1)Tm4Pu8 cuboctahedra, edges with six equivalent Tm(1)Pu12 cuboctahedra, edges with twelve equivalent Pu(1)Tm4Pu8 cuboctahedra, faces with four equivalent Tm(1)Pu12 cuboctahedra, and faces with sixteen equivalent Pu(1)Tm4Pu8 cuboctahedra. Tm(1) is bonded to twelve equivalent Pu(1) atoms to form TmPu12 cuboctahedra that share corners with six equivalent Tm(1)Pu12 cuboctahedra, corners with twelve equivalent Pu(1)Tm4Pu8 cuboctahedra, edges with eighteen equivalent Pu(1)Tm4Pu8 cuboctahedra, faces with eight equivalent Tm(1)Pu12 cuboctahedra, and faces with twelve equivalent Pu(1)Tm4Pu8 cuboctahedra.
Pu3Tm is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Pu(1) is bonded to eight equivalent Pu(1) and four equivalent Tm(1) atoms to form PuTm4Pu8 cuboctahedra that share corners with four equivalent Tm(1)Pu12 cuboctahedra, corners with fourteen equivalent Pu(1)Tm4Pu8 cuboctahedra, edges with six equivalent Tm(1)Pu12 cuboctahedra, edges with twelve equivalent Pu(1)Tm4Pu8 cuboctahedra, faces with four equivalent Tm(1)Pu12 cuboctahedra, and faces with sixteen equivalent Pu(1)Tm4Pu8 cuboctahedra. There are a spread of Pu(1)-Pu(1) bond distances ranging from 3.37-3.48 Å. There are two shorter (3.42 Å) and two longer (3.43 Å) Pu(1)-Tm(1) bond lengths. Tm(1) is bonded to twelve equivalent Pu(1) atoms to form TmPu12 cuboctahedra that share corners with six equivalent Tm(1)Pu12 cuboctahedra, corners with twelve equivalent Pu(1)Tm4Pu8 cuboctahedra, edges with eighteen equivalent Pu(1)Tm4Pu8 cuboctahedra, faces with eight equivalent Tm(1)Pu12 cuboctahedra, and faces with twelve equivalent Pu(1)Tm4Pu8 cuboctahedra.