<div dir="auto">See <a href="http://www.globalsino.com/EM/page3013.html">http://www.globalsino.com/EM/page3013.html</a> -- they are equivalent, except Wien prefers ones to simplify the symmetry.</div><div class="gmail_extra"><br><div class="gmail_quote">On May 26, 2017 17:04, "fatima DFT" <<a href="mailto:fatimadft5@gmail.com">fatimadft5@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">
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<div class="gmail_extra">Thank you Sir,</div>
<div class="gmail_extra">Your answer helped me to identify the source of error. The structure file is not good. Now I have new structure file and the optimization is going on as expected.</div>
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<div class="gmail_extra">The new structure is taken from this paper: <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__pubs.acs.org_doi_pdf_10.1021_ic990921e&d=DwMFaQ&c=yHlS04HhBraes5BQ9ueu5zKhE7rtNXt_d012z2PA6ws&r=U_T4PL6jwANfAy4rnxTj8IUxm818jnvqKFdqWLwmqg0&m=heNvrHigeplBetE6QItDeRrjzTZBnL0eynirAtC9j-s&s=5PLjZo7MMCrABGUjpsw_zpSdXLoKETOGLWzhLk4FVYM&e=" target="_blank">Alonso
et al.</a></div>
<div class="gmail_extra">Table 2 column 2. </div>
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<div class="gmail_extra">But the authors (also most of the authors) have reported this structure as Pbnm and when I initialized the structure it shows a warning and automatic stabilize in Pnma SG.</div>
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<div class="gmail_extra">Is this normal?</div>
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<div class="gmail_quote">On Fri, May 26, 2017 at 8:51 PM, Laurence Marks <span dir="ltr">
<<a href="mailto:L-marks@northwestern.edu" target="_blank">L-marks@northwestern.edu</a>></span> wrote:<br>
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Most structures (almost all) have higher symmetry. You probably used a<br>
not so good location for the structure.<br>
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<div>Yes, it was the problem in structure. Now I have new structure file and optimization is going on as expected.</div>
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Pr is a rare-earth with a normal valence of +3, for which you need +U<br>
or -eece otherwise the unoccupied 4f will turn it metallic. Not sure<br>
if you need it for +U to get an insulator; for a proper result you<br>
probably do.<br>
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I strongly suggest that you run many more simpler cases using MSR1a<br>
before trying something as hard as this.<br>
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<div>Sure, Sir! I should test many test cases first. </div>
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