<div dir="ltr"><pre>Dear Dr.Gerhard</pre><pre>Thanks for your quick answer. According to you, I should start with P1 cell,<br></pre><pre>which could also obtained by splitting the atomic positions of Fe-atoms<br></pre><pre>of this pm(6) space group (12 atoms). Further, In your mail, I have seen the statement<br><br><b>"For Phonon calculations one would need the P 1 cell,
otherwise one moves (in certain cases) 2 or more atoms at once out of there
equilibrium positions (here Fe atoms)"<br></b><br></pre><pre>Can please, elaborate it (why one needs P1 cell as starting structure (before doing supercell))<br></pre><pre>for phonon calculations...why the atoms go out of their equilibrium positions, if i start with other than P1 symmetry. <br></pre><pre><br><br></pre>Thanking you and looking forward to your answers<br clear="all"><div><br></div><div>Sincerely,<br></div><div>Ch. Venkatesh<br></div></div>