Fig. 7. Relative energies and forces of the NaCl clusters.

a Relative energies of all potentials with respect to the DFT minima of the Na₈Cl${}_8^{+}$ and the Na₉Cl${}_8^{+}$ clusters as a function of the Na–Na distance and b forces acting on the blue sodium atom for the the path shown in Fig. 6. For the 3G-HDNNP unscaled charges have been used in this plot.