<div dir="ltr"><font face="verdana, sans-serif">Dear Prof. Blaha,</font><div><font face="verdana, sans-serif"><br></font><div><font face="verdana, sans-serif">Thanks for the reply. I still have some doubts. I have Ba2ZnWO6 and Ba2CdWO6 systems and both have Fm-3m space group. I want to replace Zn by Cd in 25%, 50 % and 75% manner. So, total I will have five systems:-</font></div><div><font face="verdana, sans-serif">(1) Ba2ZnWO6</font></div><div><font face="verdana, sans-serif">(2) Ba2Zn0.25Cd0.75WO6</font></div><div><font face="verdana, sans-serif">(3) Ba2Zn0.50Cd0.50WO6 <br></font></div><div><div><font face="verdana, sans-serif">(4) Ba2Zn0.25Cd0.75WO6 <br></font></div><div></div></div><div><font face="verdana, sans-serif">(5) Ba2CdWO6 </font></div><div><font face="verdana, sans-serif"><br></font></div><div><font face="verdana, sans-serif">So, I created a 2x2x2 supercell and initialized the calculation. The systems 2 and 4 converted into pm-3m that looked okay as I could compare the lattice parameters and decide if the generated systems are okay by ensuring the lattice parameter of doped systems (i.e. 2,3 &4) lie between lattice parameters of 1 and 5. However, system 3 converts into P4/mmm (tetragonal). In this case, we can't compare the lattice parameters of system 3 with 1 & 5 and ensure the structure. How should I overcome this and proceed for further calculations?</font></div></div><div><font face="verdana, sans-serif"><br></font></div><div><font face="verdana, sans-serif">Thanks. </font></div><div><font face="verdana, sans-serif">Regards,</font></div><div><font face="verdana, sans-serif">Abhijeet.</font></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 24, 2020 at 11:29 PM Abhijeet Jaysingrao Kale (P18PH001) <<a href="mailto:kale.2@iitj.ac.in">kale.2@iitj.ac.in</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">Dear WIEN2k Users,<div><br></div><div>I am Abhijeet from IIT Jodhpur, India, using the WIEN2k_17.1 version. Currently, I am studying A2BB'X6 material. For the same, it is required to generate a 2*2*2 supercell. I want to substitute the B atom in
A2BB'X6
by C. The desired doping percentage are 25% C, 50%C and 75%C. </div><div><br></div><div>For 25%C and 75%C, the space group of generated supercell changed to pm-3m from fm-3m of a pristine unit cell of
A2BB'X6
. However, with 50%C in A2BB'X6
material (i.e
A2B50%B'50%X6
) case, the generated supercell exists in a very different space group of P4/mmm (tetragonal). I would like to know if both the changes i.e. "fm-3m to pm3m" and "fm-3m to P4/mmm" are okay to move on with. If not, then please suggest how to deal with it. </div><div><br></div><div>Thanks.</div><div><br></div><div>regards,</div><div>Abhijeet</div></div>
</blockquote></div>