Similarity law and critical properties in ionic systems

TL;DR

This paper uses molecular simulations to explore the thermodynamic properties of ionic systems, revealing a linear similarity law that accurately predicts critical data and relates properties across different compounds.

Contribution

It introduces a similarity law based on Boyle parameters that accurately predicts critical properties and relates ionic system behaviors across size asymmetries.

Findings

The Zeno line follows a linear law in ionic systems.

The Boyle parameters enable accurate critical data prediction.

Boyle density scales linearly with size asymmetry.

Abstract

Using molecular simulations, we determine the locus of ideal compressibility, or Zeno line, for a series of ionic compounds. We find that the shape of this thermodynamic contour follows a linear law, leading to the determination of the Boyle parameters. We also show that a similarity law, based on the Boyle parameters, yields accurate critical data when compared to the experiment. Furthermore, we show that the Boyle density scales linearly with the size-asymmetry, providing a direct route to establish a correspondence between the thermodynamic properties of different ionic compounds.