Fig. 1: Phase diagram of SF6.
From: Near-critical dark opalescence in out-of-equilibrium SF6
a The generic pressure, temperature, volume (p,V,T) Gibbs surface showing the three phases, their coexistence and their boundaries. b Color plot of the isochore specific heat of SF6, cV, in units of the Boltzmann constant near its critical point, according to the NIST database42. The melting curve (bold solid line) stops at the critical point and is followed by the Widom line (dashed line), identified by the peak in the specific heat data42). Three lines corresponding to specific cV values are indicative of the crossover Frenkel line (See Introduction and Results sections). c The liquid-gas boundaries of SF6 in the (temperature, specific volume) plane42. The dashed line is an approximate sketch of the spinodal line separating unstable and metastable regions of liquid-gas coexistence. Quenching the fluid at constant volume will push it to the spinodal region.
