The number of atomic pairs with sharp peaks in the d(C6 AB )/d(CN) plots is shown in Figure . The k3 AB values for several hundred atomic pairs remained at 4. Since the largest part of the periodic table consists of metal atoms, a significant portion of the considered pairs has quite low k3<1. Nevertheless, as we will see below, the accuracy tested with large datasets is not significantly affected. The new relative C6 AB coefficients vs. CN A graphs can be seen in Figure . As expected, all the curves become much smoother relative to Figure .