<div dir="ltr">Dear Sir,<div>I always uses celldm(1)= true value of alat but for some strain calculations I found this way simple so I use like below.</div><div><br></div><div>ibrav=0</div><div>celldm(1)=1</div><div><br></div><div>CELL_PARAMETERS alat<br> 11.997442506 0.000000000 -0.016525082<br> 0.000000000 14.938422813 0.000000000<br> -8.268104666 0.000000000 26.787387007<br></div><div><br></div><div>I stuck many times in the start of QE learning and now I see that if we use CELL_PARAMETERS alat then it multiply with celldm(1) to all the cell_parameters. So using celldm(1)=1 should not affect our results.</div><div><br></div><div>However, you suggestion is most welcome and I will try to follow that only.</div><div><br></div><div>Best Wishes,</div><div><br></div><div>Ms. Rekha</div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Apr 19, 2020 at 10:35 PM Paolo Giannozzi <<a href="mailto:p.giannozzi@gmail.com">p.giannozzi@gmail.com</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 dir="ltr"><div>It is a good idea to set "alat" to the "true" lattice parameter, not to 1 (although the code should work irrespective of the value chosen for "alat", as long as the cell and the atomic positions are correct)</div><div><br></div><div>Paolo<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Apr 19, 2020 at 6:22 PM rekha sharma <<a href="mailto:rekha1997jpr@gmail.com" target="_blank">rekha1997jpr@gmail.com</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 dir="ltr"><div dir="ltr">hmm, Sorry.<div><br><div>My fault. defined alat=X and a11=X in CELL_PARAMETERS alat</div></div><div>Defining alat=1 cured the problem.</div><div><br></div><div>Thank you very much for your response and inconvenience is regretted.</div><div><br></div><div>Best Wishes</div><div>Ms. Rekha </div><div><br></div></div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><font size="4" face="georgia, serif"><br></font></div><div><br></div><div></div></div></div></div></div>
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<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" rel="noreferrer" target="_blank">https://lists.quantum-espresso.org/mailman/listinfo/users</a></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><font face="georgia, serif" size="4"><br></font></div><div><font face="georgia, serif" size="4"><br></font></div><div><font face="georgia, serif" size="4"><br></font></div><div><font face="georgia, serif" size="4"><br></font></div><div><font face="georgia, serif" size="4">Best wishes</font></div><div><br></div><div><div><font face="georgia, serif" color="#000000" size="4">Ms. Rekha</font></div><div><span style="color:rgb(0,0,0);font-family:georgia,serif;font-size:large">Teaching Assistant,</span></div><div><font color="#000000" face="georgia, serif" size="4">Department of Physics</font></div><div><span style="color:rgb(0,0,0);font-family:georgia,serif;font-size:large">RK college, Jaipur, </span><span style="color:rgb(0,0,0);font-family:georgia,serif;font-size:large">India</span></div><div><font face="georgia, serif" color="#000000" size="4">Mob.: +11 90-95 790 71 697</font></div><div><font face="georgia, serif" color="#000000" size="4">Email: <a href="mailto:rekha1997jpr@gmail.com" target="_blank">rekha1997jpr@gmail.com</a></font></div></div></div></div></div></div>