<div dir="ltr"><div>Hello Michal,</div><div>the pw.x code always uses symmetry to reduce the number of k-points, never to reduce the number of atoms. Whatever it does, it profusely writes to output (especially if you set verbosity='high'.</div><div><br></div><div>regards<br></div><div dir="auto"><br><div data-smartmail="gmail_signature">-- <br>Lorenzo Paulatto</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 5 Dec 2020, 11:13 Husak Michal, <<a href="mailto:Michal.Husak@vscht.cz" target="_blank">Michal.Husak@vscht.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">Hi<br>
<br>
I have a question to QE developers.<br>
<br>
The Material Cloud as well as BURAI gui generate QE files without<br>
information about the cell centering (Bravais lattic).<br>
As the result QE calculates with 2-4x more atoms than neccesary in<br>
the corresponding primitive non-centered unit cell ...<br>
<br>
Does it realy work in this way = enormous waste of computational time ?<br>
<br>
Or does QE identify internaly the F,I,A,C,B cenration and utilize this information ?<br>
<br>
What about k-points ? Are they reduced based on symmetry when no symmery is given in input ?<br>
<br>
Michal<br>
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