<div dir="ltr">On Wed, Jan 31, 2018 at 6:28 PM, Yin Li <span dir="ltr"><<a href="mailto:liyincumt@gmail.com" target="_blank">liyincumt@gmail.com</a>></span> wrote:<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
<div style="MARGIN:10px">
<div><span><span style="FONT-SIZE:10.5pt;FONT-FAMILY:Times New Roman;COLOR:#000000"> </span></span></div>
<div style="FONT-FAMILY:Times New Roman"><span lang="EN-US"><font face="Calibri">I downloaded a XRD result of a crystal from CCDC. The cif file
shows it has a space group of P2_12_12_1. I found after geometry optimization in
PWscf, the symmetry has been reduced into P2_1. </font></span></div></div></blockquote><div>The final symmetry found by PWscf is the same as the initial symmetry found by PWscf (please check: the code should stop otherwise). This may differ from the expected symmetry for reason that are explained in some detail in the documentation and in the FAQ<br> <br></div><div>Paoo<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="MARGIN:10px"><div style="FONT-FAMILY:Times New Roman"><span lang="EN-US"><font face="Calibri">Is there any option or method to
keep the symmetry invariant during geometry optimization in
PWscf?</font></span>
<p class="MsoNormal" style="MARGIN:0cm 0cm 0pt"><span lang="EN-US"><u></u><u></u><font face="Calibri"> </font><u></u></span></p>
<p class="MsoNormal" style="MARGIN:0cm 0cm 0pt"><span lang="EN-US"><font face="Calibri">Thanks a lot in advance!</font></span></p><span class="HOEnZb"><font color="#888888">
<p class="MsoNormal" style="MARGIN:0cm 0cm 0pt"><span lang="EN-US"><u></u><font face="Calibri"> </font><u></u></span></p>
<p class="MsoNormal" style="MARGIN:0cm 0cm 0pt"><span lang="EN-US"><font face="Calibri">Yin</font></span></p></font></span></div></div>
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