Np3Ho is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Np(1) is bonded to eight equivalent Np(1) and four equivalent Ho(1) atoms to form NpHo4Np8 cuboctahedra that share corners with twelve equivalent Np(1)Ho4Np8 cuboctahedra, edges with eight equivalent Ho(1)Np12 cuboctahedra, edges with sixteen equivalent Np(1)Ho4Np8 cuboctahedra, faces with four equivalent Ho(1)Np12 cuboctahedra, and faces with fourteen equivalent Np(1)Ho4Np8 cuboctahedra. Ho(1) is bonded to twelve equivalent Np(1) atoms to form HoNp12 cuboctahedra that share corners with twelve equivalent Ho(1)Np12 cuboctahedra, edges with twenty-four equivalent Np(1)Ho4Np8 cuboctahedra, faces with six equivalent Ho(1)Np12 cuboctahedra, and faces with twelve equivalent Np(1)Ho4Np8 cuboctahedra.
Np3Ho is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Np(1) is bonded to eight equivalent Np(1) and four equivalent Ho(1) atoms to form NpHo4Np8 cuboctahedra that share corners with twelve equivalent Np(1)Ho4Np8 cuboctahedra, edges with eight equivalent Ho(1)Np12 cuboctahedra, edges with sixteen equivalent Np(1)Ho4Np8 cuboctahedra, faces with four equivalent Ho(1)Np12 cuboctahedra, and faces with fourteen equivalent Np(1)Ho4Np8 cuboctahedra. All Np(1)-Np(1) bond lengths are 3.28 Å. All Np(1)-Ho(1) bond lengths are 3.28 Å. Ho(1) is bonded to twelve equivalent Np(1) atoms to form HoNp12 cuboctahedra that share corners with twelve equivalent Ho(1)Np12 cuboctahedra, edges with twenty-four equivalent Np(1)Ho4Np8 cuboctahedra, faces with six equivalent Ho(1)Np12 cuboctahedra, and faces with twelve equivalent Np(1)Ho4Np8 cuboctahedra.