<div dir="ltr"><div dir="ltr">On Tue, Jul 2, 2019 at 6:03 AM Arvin Kakekhani <<a href="mailto:arvink@sas.upenn.edu">arvink@sas.upenn.edu</a>> wrote:</div><div dir="ltr"><br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">If one wants to perform an isolated molecule-in-box calculation using Martyna-Tuckerman method as implemented in QE 6.3, does it in practice matter where the molecule is located inside the box (e.g., center versus boundaries), or the results are independent of this?</blockquote><div><br></div><div>results are independent (or at least, they should be)</div><div><br></div><div>Paolo<br></div><div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> Also related to this question is there a rule of thumb for estimating the minimum cell size to accurately mimic the ideally isolated molecule, or one needs to run convergence tests for each specific system?<br>
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Thanks in advance,<br>
Arvin Kakekhani<br>
Postdoc at the University of Pennsylvania<br>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div></div>