Np3Al 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 Al(1) atoms to form NpNp8Al4 cuboctahedra that share corners with twelve equivalent Np(1)Np8Al4 cuboctahedra, edges with eight equivalent Al(1)Np12 cuboctahedra, edges with sixteen equivalent Np(1)Np8Al4 cuboctahedra, faces with four equivalent Al(1)Np12 cuboctahedra, and faces with fourteen equivalent Np(1)Np8Al4 cuboctahedra. Al(1) is bonded to twelve equivalent Np(1) atoms to form AlNp12 cuboctahedra that share corners with twelve equivalent Al(1)Np12 cuboctahedra, edges with twenty-four equivalent Np(1)Np8Al4 cuboctahedra, faces with six equivalent Al(1)Np12 cuboctahedra, and faces with twelve equivalent Np(1)Np8Al4 cuboctahedra.
Np3Al 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 Al(1) atoms to form NpNp8Al4 cuboctahedra that share corners with twelve equivalent Np(1)Np8Al4 cuboctahedra, edges with eight equivalent Al(1)Np12 cuboctahedra, edges with sixteen equivalent Np(1)Np8Al4 cuboctahedra, faces with four equivalent Al(1)Np12 cuboctahedra, and faces with fourteen equivalent Np(1)Np8Al4 cuboctahedra. All Np(1)-Np(1) bond lengths are 3.05 Å. All Np(1)-Al(1) bond lengths are 3.05 Å. Al(1) is bonded to twelve equivalent Np(1) atoms to form AlNp12 cuboctahedra that share corners with twelve equivalent Al(1)Np12 cuboctahedra, edges with twenty-four equivalent Np(1)Np8Al4 cuboctahedra, faces with six equivalent Al(1)Np12 cuboctahedra, and faces with twelve equivalent Np(1)Np8Al4 cuboctahedra.