Np3Tl 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 Tl(1) atoms to form NpNp8Tl4 cuboctahedra that share corners with twelve equivalent Np(1)Np8Tl4 cuboctahedra, edges with eight equivalent Tl(1)Np12 cuboctahedra, edges with sixteen equivalent Np(1)Np8Tl4 cuboctahedra, faces with four equivalent Tl(1)Np12 cuboctahedra, and faces with fourteen equivalent Np(1)Np8Tl4 cuboctahedra. Tl(1) is bonded to twelve equivalent Np(1) atoms to form TlNp12 cuboctahedra that share corners with twelve equivalent Tl(1)Np12 cuboctahedra, edges with twenty-four equivalent Np(1)Np8Tl4 cuboctahedra, faces with six equivalent Tl(1)Np12 cuboctahedra, and faces with twelve equivalent Np(1)Np8Tl4 cuboctahedra.
Np3Tl 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 Tl(1) atoms to form NpNp8Tl4 cuboctahedra that share corners with twelve equivalent Np(1)Np8Tl4 cuboctahedra, edges with eight equivalent Tl(1)Np12 cuboctahedra, edges with sixteen equivalent Np(1)Np8Tl4 cuboctahedra, faces with four equivalent Tl(1)Np12 cuboctahedra, and faces with fourteen equivalent Np(1)Np8Tl4 cuboctahedra. All Np(1)-Np(1) bond lengths are 3.29 Å. All Np(1)-Tl(1) bond lengths are 3.29 Å. Tl(1) is bonded to twelve equivalent Np(1) atoms to form TlNp12 cuboctahedra that share corners with twelve equivalent Tl(1)Np12 cuboctahedra, edges with twenty-four equivalent Np(1)Np8Tl4 cuboctahedra, faces with six equivalent Tl(1)Np12 cuboctahedra, and faces with twelve equivalent Np(1)Np8Tl4 cuboctahedra.