<div dir="ltr">Hi<div><br></div><div>It is not possible to do that with the released version of CP2K. To fix the ratio of a/c during CELL_OPT, you will need to modify one of the routine in $CP2K/cp2k/src/motion/cell_opt_utils.F, and then recompile the code. $CP2K is the root directory of the CP2K source code on your machine.</div><div><br></div><div>SL</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 27 October 2015 at 11:01, Francesco Ambrosio <span dir="ltr"><<a href="mailto:francesco...@epfl.ch" target="_blank">francesco...@epfl.ch</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hello everybody,<br><br>I would like to know if it is possible in cp2k to perform a cell optimization keeping fixed the ratio a/c between the lattice parameters. <br>I have looked in the cp2k reference manual but I could not find anything.<br><br>Thanks for your attention<br><br>Best Regards<span class="HOEnZb"><font color="#888888"><br><br>Francesco Ambrosio<br><br><br><br><br></font></span></div><span class="HOEnZb"><font color="#888888">
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