To extract specific values for the CN from the MD simulations, one needs to specify a distance, for which the CN is evaluated. This distance is obtained from the emergence of plateau values as a function of inter-particle distance. The corresponding values are indicated in Figs. ). The further conclusions, drawn from this analysis, do not depend on details of this choice. The resulting CNs are displayed in Tab.2. These CNs can be compared with those experimentally obtained from FTIR spectra.