Tm3Pm is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Tm(1) is bonded to eight equivalent Tm(1) and four equivalent Pm(1) atoms to form TmPm4Tm8 cuboctahedra that share corners with twelve equivalent Tm(1)Pm4Tm8 cuboctahedra, edges with eight equivalent Pm(1)Tm12 cuboctahedra, edges with sixteen equivalent Tm(1)Pm4Tm8 cuboctahedra, faces with four equivalent Pm(1)Tm12 cuboctahedra, and faces with fourteen equivalent Tm(1)Pm4Tm8 cuboctahedra. Pm(1) is bonded to twelve equivalent Tm(1) atoms to form PmTm12 cuboctahedra that share corners with twelve equivalent Pm(1)Tm12 cuboctahedra, edges with twenty-four equivalent Tm(1)Pm4Tm8 cuboctahedra, faces with six equivalent Pm(1)Tm12 cuboctahedra, and faces with twelve equivalent Tm(1)Pm4Tm8 cuboctahedra.
Tm3Pm is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Tm(1) is bonded to eight equivalent Tm(1) and four equivalent Pm(1) atoms to form TmPm4Tm8 cuboctahedra that share corners with twelve equivalent Tm(1)Pm4Tm8 cuboctahedra, edges with eight equivalent Pm(1)Tm12 cuboctahedra, edges with sixteen equivalent Tm(1)Pm4Tm8 cuboctahedra, faces with four equivalent Pm(1)Tm12 cuboctahedra, and faces with fourteen equivalent Tm(1)Pm4Tm8 cuboctahedra. All Tm(1)-Tm(1) bond lengths are 3.53 Å. All Tm(1)-Pm(1) bond lengths are 3.53 Å. Pm(1) is bonded to twelve equivalent Tm(1) atoms to form PmTm12 cuboctahedra that share corners with twelve equivalent Pm(1)Tm12 cuboctahedra, edges with twenty-four equivalent Tm(1)Pm4Tm8 cuboctahedra, faces with six equivalent Pm(1)Tm12 cuboctahedra, and faces with twelve equivalent Tm(1)Pm4Tm8 cuboctahedra.