<div dir="ltr">Dear Yu Hailin, try to use "vc-relax" calculation with the tag "cell_dofree = z"<div><br></div><div>Best</div><div><br></div><div>Arles V. Gil Rebaza</div><div>Instituto de Física La Plata</div><div>Argentina</div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-01-07 8:07 GMT-03:00 于海林 <span dir="ltr"><<a href="mailto:yuhailin_79@126.com" target="_blank">yuhailin_79@126.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Dear all</div><div>I want to perform a constraint calculation for hexagonal GaN. The <i>a</i> and <i>b</i> lattice constants are constrainted, and the<i> c</i> lattice constant , cell volume and atomic accordinate are relaxed.</div><div>But I don't know how to set the [CONSTRAINTS] card. I wish to get your help. Thanks in advance!</div><div><br></div><div>Best Regards!</div><div>Yu Hailin </div></div><br><br><span title="neteasefooter"><span></span></span><br>_______________________________________________<br>
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