<div dir="ltr">Dear Hailouf,<div><br></div><div>I think it is not easy to help you with the information you provided.</div><div>1) What do you mean with "an incorrect crystal structure"? Is Quantum-ESPRESSO giving a structure you do not expect or the calculation fails for some other reason? In the case, what is the "error" provided by the code?</div><div>2) In ibrav=6 produces the "correct structure", then your structure is simple tetragonal? Or you are trying to reproduce a body-centered tetragonal structure using a simple tetragonal unit cell?</div><div><br></div><div>With some more detail (and/or input/output files), maybe a more helpful answer could be issued.</div><div><br></div><div>Giovanni</div><div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><span style="color:rgb(0,0,0)">-- <br><br>Giovanni Cantele, PhD<br>CNR-SPIN<br>c/o Dipartimento di Fisica<br>Universita' di Napoli "Federico II"<br>Complesso Universitario M. S. Angelo - Ed. 6<br>Via Cintia, I-80126, Napoli, Italy<br><a href="mailto:giovanni.cantele@spin.cnr.it" style="color:rgb(17,85,204)" target="_blank">e-mail: giovanni.cantele@spin.cnr.it</a><br>Phone: +39 081 676910<br>Skype contact: giocan74<br><br>ResearcherID: <a href="http://www.researcherid.com/rid/A-1951-2009" style="color:rgb(17,85,204)" target="_blank">http://www.researcherid.com/rid/A-1951-2009</a><br>Web page: </span><a href="https://sites.google.com/view/giovanni-cantele/home" style="color:rgb(17,85,204)" target="_blank">https://sites.google.com/view/giovanni-cantele/home</a><br></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno sab 30 dic 2023 alle ore 14:05 houssam eddine hailouf via users <<a href="mailto:users@lists.quantum-espresso.org">users@lists.quantum-espresso.org</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear Quantum Espresso Group,<div><br></div><div>I am currently studying systems within the body-centered tetragonal structure. I've encountered an issue where setting ibrav = 7 yields an incorrect crystal structure, while using ibrav = 6 produces the correct structure, and calculations proceed smoothly. Could you provide any insights or explanations regarding this situation?</div><div><br></div><div>Thank you,</div><div>Hailouf houssam </div><div>Materials Science and Informatics Laboratory, Djelfa algerie.</div>_______________________________________________<br>
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