<div dir="ltr">Dear All,<div> I am sending the LiNiNbO4_ca_initial.struct file which is obtained after volume optimization with a:b:c =constant. Also I am sending
LiNiNbO4_ba_initial.struct which is obtained after c/a optimization with constant volume and b/a. Both the structures are showing same unit cell volume as ~ 2144 bohr^3 as I have obtained in my calculation where as the printed volume in the w2web page obtained after c/a optimization is 2058.7690 bohr^3 which is different than the actual optimized volume we have obtained. Please comment on this.</div><div><br></div><div>with regards, </div><div> </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 13 Jun 2020 at 02:03, Tomas Kana <<a href="mailto:kana@seznam.cz">kana@seznam.cz</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div><br></div><div><div><span>Zpět</span><span title="Odpovědět"></span><span title="Označit"></span><span title="Smazat"></span><span title="Přesunout"></span></div><div style="width:360px;height:512px"><div><div><div><img src="https://i.im.cz/private-avatar/6be7aba869b05ecd061bd77ff52f23ec0d7890f91360a35dc19cfad48b41ad7080ea62f5311a154a/96"><span>Dnes 22:15</span><dl><dd style="margin-left:0px"><span style="white-space:nowrap;display:inline-block;overflow:hidden;text-overflow:ellipsis;font-size:20px;line-height:1;margin-right:8px">Tomas Kana</span></dd><dt>Komu:</dt><dd><span><span style="font-size:14px;padding:0px 4px" title=""><a href="mailto:wien@zeus.theochem.tuwien.ac.at" target="_blank">wien@zeus.theochem.tuwien.ac.at</a></span></span></dd></dl><div><div></div><h2>Re: [Wien] Volume has changed during running optimization of c/a with constant volume & b/a</h2></div></div><div></div><div>Dear Shamik, If I understand you correctly then I suggest to visualise better your energy-volume curve. Try this (it works for me): 1. Keep c/a and b/a experimental ones and run x optimize option 1 and make an energy-volume curve by modifying he option save_lapw -d ../$i $i in the file optimize.job that is produced by x optimize. 2. For each separated directory run_lapw and collect all the scf files to one one directory and visualise the resulting energy-volume curve by e<span style="background-color:transparent">plot -t vol </span>3. In each separated directory optimize c/a at constant volume and b/a. Again collect all scf files and visualise both "experimental" and "relaxed" energy volume curve in one plot. You will probably note and understand the difference between the two mimimums. 4. Do the same optimization for b/a at constant volume and c/a and draw the three energy-volume curves together. Their minima could again differ. Repeat 3 and 4 until the resulting e-v curve does not substantially differ from the preceding one. Alternatively you may use the package OrthoOpt from wien2k goodies. </div></div></div></div></div></div>_______________________________________________<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-size:small">Dr. Shamik Chakrabarti</div><div style="font-size:small">Research Fellow </div><div style="font-size:small">Department of Physics</div><div style="font-size:small">Indian Institute of Technology Patna</div><div style="font-size:small">Bihta-801103</div><div style="font-size:small">Patna</div><div style="font-size:small">Bihar, India</div></div></div></div></div></div></div></div>