<div dir="ltr">Thanks!<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Nov 5, 2014 at 1:34 PM, Paolo Giannozzi <span dir="ltr"><<a href="mailto:paolo.giannozzi@uniud.it" target="_blank">paolo.giannozzi@uniud.it</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5">On Tue, 2014-11-04 at 23:12 -0800, Navaneetha Krishnan wrote:<br>
<br>
> I am trying to calculate the IFCs for a FCC lattice (Al) for a few<br>
> nearest neighbours. I was following a set of threads, which led me to<br>
> this one :<br>
><br>
> <a href="http://www.democritos.it/pipermail/pw_forum/2009-August/013613.html" target="_blank">http://www.democritos.it/pipermail/pw_forum/2009-August/013613.html</a><br>
<br>
> Could someone elaborate on the statement (in this webpage),<br>
> "Notice also that the force constant grid is written as these were<br>
> periodic ...<br>
> so in a 4x4x4 grid R(1,1,1) = 0, R(2,1,1,) = a1, and R(4,1,1)=-a1"?<br>
><br>
> More specifically, what is R(3, 1, 1) in this case?<br>
<br>
</div></div>2*a1<br>
<br>
Paolo<br>
<span class=""><br>
> Thanks a lot!<br>
> --<br>
> Navaneeth<br>
> Caltech<br>
><br>
><br>
><br>
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<span class="HOEnZb"><font color="#888888"><br>
--<br>
Paolo Giannozzi, Dept. Chemistry&Physics&Environment,<br>
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>
Phone <a href="tel:%2B39-0432-558216" value="+390432558216">+39-0432-558216</a>, fax <a href="tel:%2B39-0432-558222" value="+390432558222">+39-0432-558222</a><br>
<br>
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</font></span></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr"><div>Navaneetha Krishnan Ravichandran,<div>Graduate Student,</div><div>Mechanical Engineering,</div><div>Caltech.</div></div></div></div>
</div>