<div dir="auto">Yet to receive any help. Looking for some responses from experts.</div><br><div class="gmail_quote"><div dir="ltr">On Sun, May 19, 2019, 12:27 AM Subhasis Panda <<a href="mailto:onnyorup.iit@gmail.com">onnyorup.iit@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">Dear experts,<div dir="auto">I've used Wien2k and subsequently Gibbs2 package to study structural phase transition between two polymorphs of a material. The enthalpy vs pressure plot at T=0K gives me the transition pressure for a particular transition.</div><div dir="auto">However, when I try to plot difference of Gibbs free energy at P=0 GPa it doesn't cross zero. But, the literature is showing transition temperature for the phase transition.</div><div dir="auto">So, my questions are</div><div dir="auto">1) How to determine the transition temperature <span style="font-family:sans-serif">at P=0 GPa or at any pressure?</span></div><div dir="auto"><span style="font-family:sans-serif">2) How do we get the variation of transition pressure with temperature? </span></div><div dir="auto"><font face="sans-serif">Looking forward for your valuable comments.</font></div><div dir="auto"><span style="font-family:sans-serif">Any reference in this direction is most welcomed.</span><br></div><div dir="auto"><span style="font-family:sans-serif">Thank you in advance for the help.</span></div></div>
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