Taking (BN)4C10 as an example, the unit sphere representation of the polarizability in zero-frequency limit is plotted in Figure (b). It can be seen that the polarizability tensors perpendicular to the molecular plane is significantly weaker than those in the parallel directions, while the tensors in each direction along the molecular plane are comparable. This is consistent with the analysis results of the polarizability components, as displayed in Table and Figure (a). Obviously, the αxx(∞) and αyy(∞) play a dominant and similar role in the contribution to αiso(∞) of (BN)4C10.