<div dir="ltr">Inlined<div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><br></div><div dir="ltr"><span style="font-size:small">-----------------------------------</span><br></div><div dir="ltr">Professor Laurence Marks<br><span style="font-size:12.8px">"Research is to see what everybody else has seen, and to think what nobody else has thought", </span><span style="font-size:12.8px">Albert Szent-Gyorgi</span><br><a href="http://www.numis.northwestern.edu" target="_blank">www.numis.northwestern.edu</a> ; <span style="font-size:12.8px">Corrosion in 4D: </span><a href="http://MURI4D.numis.northwestern.edu" style="font-size:12.8px" target="_blank">MURI4D.numis.northwestern.edu</a><div><span style="font-size:12.8px">Partner of the CFW 100% program for gender equity, </span><a href="http://www.cfw.org/100-percent" style="font-size:12.8px" target="_blank">www.cfw.org/100-percent</a></div><div>Co-Editor, Acta Cryst A</div></div></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">On Mon, Feb 15, 2016 at 11:08 PM, Amir lot <span dir="ltr"><<a href="mailto:lot.amir@yahoo.com" target="_blank">lot.amir@yahoo.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div>Dear WIEN2k users,</div>
<div>As I can guess mini or PORT program works as:
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<div>The program gets Energy ( and forces) of compound and positions of atoms which have forces.</div>
<div>PORT program using these data provides next new positions related to atoms which have forces.</div>
<div dir="ltr">using new generated struct file with new positions, the PORT program does a scf.</div>
<div dir="ltr">Now, The program gets new energy of compound with new positions of atoms which have forces and produces next new positions.</div>
<div dir="ltr">The PORT repeats the above steps till forces drops below for example 1 . </div>
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<div dir="ltr">First question</div>
<div dir="ltr">Are the above steps correct?</div></div></div></blockquote><div> </div><div>Yes </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif;font-size:16px">
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<div dir="ltr">second question</div>
<div dir="ltr">How does PORT produces equivalent positions related to new positions When the program want to generate the new struct file with new positions?</div></div></div></blockquote><div> </div><div>It uses the symmetry relations between the positions which are at the end of case.struct </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif;font-size:16px">
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<div dir="ltr">Third question</div>
<div dir="ltr">When the positions of atom are as X=Y=Z, Does PORT program get only energy and for example X position or energy and (X,Y,Z) positions as input data? Because when (X=Y=Z) and PORT program get (X,Y,Z) as a input
data may produces new positions as (Xn#Yn#Zn) which make error because (X=Y=Z).</div></div></div></blockquote><div> </div><div>Port obeys the symmetry relationships. If due to these X=Y=Z the atomic positions always obey this constraint. If no symmetry forces this the positions may change so this is no longer an equality. Symmetry rules.</div><div><br></div><div>N.B., MSR1a is similar, but does not use the forces in the same way and ignores the energy.</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,Sans-Serif;font-size:16px">
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<div dir="ltr">With best,</div>
<div dir="ltr">Amir</div>
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