<p dir="ltr">Also, only 1 k-point (Gamma), an RMT and RKMax similar to what you use for bulk Ni, particularly as I assume you are doing the calculation to get an enthalpy of formation. You may have to use the mpi versions as it is probably too large for a non-mpi run.</p>
<p dir="ltr">If you are doing WC+U (or -ineece) the U (or on-site hybrid) removes the phase transition so convergence should be simple.</p>
<p dir="ltr">Straight WC is not a simple calculation because the physics for an isolated Ni atom is wrong. With wrong physics there is in fact no guarantee that the calculation will ever converge!</p>
<p dir="ltr">___________________________<br>
Professor Laurence Marks<br>
Department of Materials Science and Engineering<br>
Northwestern University<br>
<a href="http://www.numis.northwestern.edu">www.numis.northwestern.edu</a><br>
<a href="http://MURI4D.numis.northwestern.edu">MURI4D.numis.northwestern.edu</a><br>
Co-Editor, Acta Cryst A<br>
"Research is to see what everybody else has seen, and to think what nobody else has thought"<br>
Albert Szent-Gyorgi</p>
<div class="gmail_quote">On Dec 28, 2014 11:47 AM, "Laurence Marks" <<a href="mailto:L-marks@northwestern.edu">L-marks@northwestern.edu</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">You almost certainly need to run spin polarized, probably MSR1 (GREED 0.1), TEMPS (room temp). The convergence is complicated for WC (& simple GGAs) due to an electronic phase transition between sp & d occupation near the fixed point.</p>
<p dir="ltr">___________________________<br>
Professor Laurence Marks<br>
Department of Materials Science and Engineering<br>
Northwestern University<br>
<a href="http://www.numis.northwestern.edu" target="_blank">www.numis.northwestern.edu</a><br>
<a href="http://MURI4D.numis.northwestern.edu" target="_blank">MURI4D.numis.northwestern.edu</a><br>
Co-Editor, Acta Cryst A<br>
"Research is to see what everybody else has seen, and to think what nobody else has thought"<br>
Albert Szent-Gyorgi</p>
<div class="gmail_quote">On Dec 28, 2014 10:47 AM, "Muhammad Sajjad" <<a href="mailto:sajjadpu@gmail.com" target="_blank">sajjadpu@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div dir="ltr">Dear Users
<div>I am running SCF calculation for Ni with lattice constant of 30 Bohr and using WC-GGA. The calculation is not converging even upto 100 iterations and more. To solve the problem I have performed following steps</div>
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<div>switched to TEMPS = 0.005 from TETRA</div>
<div>Changed MSR1 to PRATT</div>
<div>changed mixing factor (increase and decrease from 0.2)</div>
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<div>Thanking in advance. </div>
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</div>
<div>Dr. Sajjad</div>
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</blockquote></div>
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