<br><br>
<br>
Dear Users,<br>
<br>
I think there is one error in the letter of Miguel MartĂnez Canales.<br>
He wrote :<br>
<br>
<div><span class="gmail_quote"></span> ibrav= 8, celldm(1)=a, celldm(2)=b/a, celldm(3)=c/a,<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">nat = 20 , ntyp = 3</blockquote><div><br>
<br>
I think the corrected one should be :<br>
<br>
ibrav= 8, celldm(1)=a (here 'a' is in Bohr Unit (alat)),<br>
<br>
celldm(2)=b/a (but here 'a' should be in Angstrom unit) <br>
<br>
Am I right Miguel??????????<br>
</div><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>Dear Users I'm also having a simple confusion.</blockquote><div><br>
My question: <br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><span class="q" id="q_10e8a77b230416bc_1"> ATOMIC_POSITIONS {bohr}<br>> Y 0.0000000E+00
0.0000000E+00
0.0000000E+00<br>> Y 7.1680498 7.1680498 7.1680498<br>> Cr1 3.5840249 3.5840249 3.5840249<br>> Cr2 10.7520752 10.7520752 10.7520752<br>> O 3.5840249 0.0000000E+00 3.5840249<br>> O
3.5840249 3.5840249 0.0000000E+00<br>> O 0.0000000E+00 3.5840249 3.5840249<br>> O 7.1680498 3.5840249 3.5840249<br>> O 3.5840249 7.1680498 3.5840249<br>> O 3.5840249 3.5840249
7.1680498</span></div></blockquote>
<div><br>
</div><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><span class="q" id="q_10e8a77b230416bc_1">><br>><br>><br>> If I use 2 formula unit then it should be
<br>><br>> Y 0.0000000E+00 0.0000000E+00 0.0000000E+00<br>> Y 7.1680498 7.1680498 7.1680498<br>><br>></span></div></blockquote>
<div><br>
</div><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><span class="q" id="q_10e8a77b230416bc_1">> OR just <br>
</span></div></blockquote>
<div><br>
</div><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><span class="q" id="q_10e8a77b230416bc_1">> Y 0.0000000E+00 0.0000000E+00 0.0000000E+00
<br>> Y
7.1680498 0.0000000E+00
0.0000000E+00<br>><br>><br>>shifted by 0.5 in X-direction only.</span></div></blockquote>
<div><br>
<br>
I'm also very much confused with the construction of correct super cell.<br>
<br>
My main confusion is if my system is non cubic (like ibrav=8) and I generate <br>
a 2 unit supercell then what I'll put for ibrav?????<br>
Will I give the same ibrav=8?????<br>
What'll be the value of celldm(1), celldm(2), celldm(3)??????<br>
It's really strange that there are so many simple example in the pwscf example directory<br>
but not a single example discussing that type of confusion. <br>
</div><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><span class="q" id="q_10e8a77b230416bc_1">> Looking forward to ur soonest reply.</span>
</div></blockquote>
<div><br>
Thanks in Advance.<br>
<br>
Srijan <br>
</div><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"></blockquote>
<div><br></div>
</div><br></div>