<div dir="ltr"><div>Dear Martin Matas</div>Thank you for the clarification. <br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 15, 2024 at 6:00 PM Ing. Martin Matas <<a href="mailto:matasma@kfy.zcu.cz">matasma@kfy.zcu.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">Dear Vishva,<br>
<br>
Change ibrav from 2 to 1.<br>
<br>
On the one hand, ibrav = 2 is a rhombohedron-shaped simulation cell, a primitive cell of the fcc structure. A rock-salt material contains 2 atoms in this cell.<br>
On the other hand, your ATOMIC_POSITIONS correspond to an 8-atom conventional cube-formed cell of the fcc structure (ibrav = 1).<br>
Hence, you describe four simulation cells instead of one, so many atoms overlap.<br>
<br>
This can be easily found in the pw.x input description.<br>
<br>
In addition, you will most probably need more k-points.<br>
<br>
Regards,<br>
<br>
Martin Matas<br>
PhD graduate<br>
University of West Bohemia<br>
Czech Republic<br>
<br>
<br>
Středa, Květen 15, 2024 13:28 CEST, VISHVA JEET ANAND via users <<a href="mailto:users@lists.quantum-espresso.org" target="_blank">users@lists.quantum-espresso.org</a>> napsal:<br>
<br>
> Dear Users<br>
> I try to relax the FeO unit cell but I face a problem that is attached here<br>
> in the output file and I also attached the input file.<br>
> In the input file are no. of atoms right with ibrav value? In input i am<br>
> using angstrom atomic position exactly at the same position as crystal.<br>
> Please help to resolve this problem.<br>
> <br>
> -- <br>
> With Regards<br>
> Vishva Jeet Anand<br>
> Research Scholar<br>
> Department of Chemistry<br>
<br>
</blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">With Regards<div>Vishva Jeet Anand</div><div>Research Scholar</div><div>Department of Chemistry <br><div><br></div></div></div></div>