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![Phase diagram of argon, excluding crystalline phases, reduced to Lennard-Jones units; the red dots show the coexisting densities from the experimental measurements of Gilgen et al. [5,6]; the densities of the soft-sphere percolation transitions PE and PA in the high-temperature limit (b=0), and the soft-sphere freezing density (black dot) are obtained from references [7], [8] and [9] respectively.](profile/Leslie-Woodcock/publication/225302459/figure/fig1/AS:341738762850304@1458488278129/Phase-diagram-of-argon-excluding-crystalline-phases-reduced-to-Lennard-Jones-units-the.png)
Phase diagram of argon, excluding crystalline phases, reduced to Lennard-Jones units; the red dots show the coexisting densities from the experimental measurements of Gilgen et al. [5,6]; the densities of the soft-sphere percolation transitions PE and PA in the high-temperature limit (b=0), and the soft-sphere freezing density (black dot) are obtained from references [7], [8] and [9] respectively.
Source publication
A phase diagram of argon based upon percolation transition loci determined from literature experimental density-pressure isotherms, and simulation values using a Lennard-Jones model shows three fluid phases. The liquid phase spans all temperatures, from a metastable amorphous ground state at 0K, to ultra-high T. There is a supercritical mesophase b...
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Citations
A phase diagram of argon based upon percola-tion transition loci determined from literature experimental p-V isotherms, and simulation val-ues using a Lennard-Jones model shows three fluid phases. The liquid phase spans all temper-atures, from a metastable amorphous ground state at 0K, to ultra-high T. There is a supercriti-cal mesophase bounded by percolation tran-sition loci, and a gas phase. Intersection of two percolation loci in the p-T plane thermodyna-mically defines a critical line between two coex-isting gas and liquid critical states at T = T c , and the single mesophase for T > T c . A debate on the absence of a van der Waals critical point in the Gibbs p-T density surface is appended.
