The reduction of the charge of the species in molten salts, including the complete removal of the Coulomb interaction, appears to have the same effect as an increase in the pressure on these systems. This observation leads to the prediction that a continuous pressure-induced structural change is to be found in the noble-metal halide melts at much lower pressures than those used to induce a similar transition in the alkali halide melts.
Silbert, M., Giro, A., Trullas, J. Continuous pressure-induced structural transition in the noble-metal halide melts. "Physical review B: condensed matter and materials physics", 1 Desembre 1992, vol. 46, núm. 22, p. 14886-14888.