Crystal‐Liquid‐Gas Phase Transitions and Thermodynamic Similarity

New Challenges for the Pressure Evolution of the Glass Temperature

“…In subsequent decades Eq. 9, most often recalled as the "Kechin equation, " became the key tool for describing experimental data associated with melting curve maximum (Drozd-Rzoska, 2005;Skripov and Faizulin, 2006;Drozd-Rzoska et al, 2007a;Rzoska and Mazur, 2007;Rzoska et al, 2010). Regarding the meaning of parameters in Eqs 6-9 one can generalize the reasoning of Burakovsky et al (Burakowsky et al, 2000;Burakovsky et al, 2003), who considered the volume-related compression factor (modulus):…”

“…There are few other approaches considering T m (P) evolution which start from the C-C or related Lindemann relations (Skripov and Faizulin, 2006). They are briefly presented below, with indications of their applicability for the glass formation.…”

“…In Skripov and Faizulin (2006) as the general reference the triple point was proposed: and the T 0 = T triple and P→ΔP = P − P triple in the SG Eq. 6.…”

“…It can be derived from the Clausius-Clapeyron (C-C) equation dT/dP = TΔV/ΔH = ΔV/ΔS, where ΔV, ΔH, and ΔS are for the volume, enthalpy, and entropy changes at the transition, assuming (dT/dP) fusion = a + bP (Skripov and Faizulin, 2006). This relation is used for the description of melting, where the "sudden and sharp" change of volume or density (ΔV, Δρ) and entropy takes place.…”

“…There are several relations for describing the pressure evolution of melting temperature: the most popular is the Simon-Glatzel (SG) equation due to its simple form and the limited number of fitted parameters (Simon and Glatzel, 1929;Skripov and Faizulin, 2006):…”