<div dir="ltr"><div><div>Dear <span name="Ganjar Kurniawan" class=""><span style class="">Ganjar</span> <span style class="">Kurniawan</span>,<br></span></div><span name="Ganjar Kurniawan" class="">Read the input structure first.<br>
<a href="http://www.quantum-espresso.org/">http://www.quantum-espresso.org/</a><span style class="">wp</span>-content/uploads/Doc/INPUT_PW.html#id3119661<br></span></div><span name="Ganjar Kurniawan" class="">Try to visualize the structure before running the calculations, using some graphical software like <span style class="">Xcrysden</span>. <br>
</span></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Nov 29, 2013 at 1:37 PM, Axel Kohlmeyer <span dir="ltr"><<a href="mailto:akohlmey@gmail.com" target="_blank">akohlmey@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On Fri, Nov 29, 2013 at 8:20 AM, Ganjar Kurniawan <<a href="mailto:zargan88@yahoo.com">zargan88@yahoo.com</a>> wrote:<br>
> Dear QE user...<br>
> I`m trying to optimize geometry of Li2FeSiO4 structure using 'relax', but<br>
> the result said that the " convergence NOT achieved after 100 iterations:<br>
> stopping ". I have used the atomic position from the literature.<br>
> here it is the input that i use<br>
<br>
</div>hmm... you seem to be using norm-conserving pseudopotentials, but use<br>
wavefunction/density cutoff values that are commonly used for<br>
ultra-soft pseudo-potentials. is there are specific reason for this?<br>
<br>
axel.<br>
<div><div class="h5"><br>
<br>
> &CONTROL<br>
> calculation = 'relax',<br>
> restart_mode = 'from_scratch',<br>
> nstep = 50<br>
> outdir = '/home/ganjar/Li2FeSiO4/pmn21/normal/relax'<br>
> pseudo_dir = '/share/apps/espresso-5.0.2/pseudo',<br>
> prefix='files_lar'<br>
> tprnfor = .true.<br>
> tstress = .true.<br>
> etot_conv_thr = 1.0D-4, forc_conv_thr = 1.0D-2<br>
> /<br>
> &SYSTEM<br>
> ibrav=0, a = 6.3219, b = 5.3935, c = 4.9939, cosAB = 0, cosAC = 0, cosBC =<br>
> 0, nat = 16, ntyp = 4, ecutwfc = 30, ecutrho = 240,<br>
> occupations = 'smearing', smearing='marzari-vanderbilt', degauss= 0.015,<br>
> nspin=1<br>
> /<br>
> &ELECTRONS<br>
><br>
> conv_thr = 1.0D-8<br>
> diagonalization = 'david', mixing_beta = 0.7, startingpot = 'atomic',<br>
> startingwfc = 'random', tqr = .true.<br>
> /<br>
> &IONS<br>
> ion_dynamics = 'bfgs'<br>
> /<br>
> ATOMIC_SPECIES<br>
> Li 6.9410 Li.pbe-mt_fhi.UPF<br>
> Fe 55.847 Fe.pbe-mt_fhi.UPF<br>
> Si 28.085 Si.pbe-mt_fhi.UPF<br>
> O 15.999 O.pbe-mt_fhi.UPF<br>
> CELL_PARAMETERS alat<br>
><br>
> 1.000 0.000 0.000<br>
> 0.000 1.000 0.000<br>
> 0.000 0.000 1.000<br>
><br>
> ATOMIC_POSITIONS alat<br>
><br>
> Li 0.2498 0.3307 0.8023<br>
> Li 0.2501 0.6693 0.3023<br>
> Li 0.7498 0.6693 0.3023<br>
> Li 0.7501 0.3307 0.8023<br>
> Fe 0.5000 0.8261 0.7960<br>
> Fe 0.0000 0.1738 0.2960<br>
> Si 0.0000 0.8297 0.8112<br>
> Si 0.5000 0.1702 0.3112<br>
> O 0.2145 0.6849 0.7013<br>
> O 0.2854 0.3150 0.2013<br>
> O 0.7145 0.3150 0.2013<br>
> O 0.7854 0.6849 0.7013<br>
> O 0.0000 0.1231 0.7118<br>
> O 0.5000 0.8768 0.2118<br>
> O 0.5000 0.1794 0.6417<br>
> O 0.0000 0.8205 0.1417<br>
><br>
> K_POINTS automatic<br>
> 2 4 4 0 0 0<br>
><br>
> what wrong with my input???<br>
> anybody can correct it??<br>
><br>
> Best regard<br>
> Ganjar Kurniawan<br>
> Bandung Institute of Technology, Indonesia<br>
><br>
><br>
><br>
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<span class="HOEnZb"><font color="#888888"><br>
<br>
<br>
--<br>
Dr. Axel Kohlmeyer <a href="mailto:akohlmey@gmail.com">akohlmey@gmail.com</a> <a href="http://goo.gl/1wk0" target="_blank">http://goo.gl/1wk0</a><br>
International Centre for Theoretical Physics, Trieste. Italy.<br>
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</font></span></blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr"><div><span style="background-color:rgb(255,255,255)"><i><b><font>NANDHA KUMAR V.</font></b></i></span><br></div><span style="background-color:rgb(238,238,238)"><span></span></span><font color="#0b5394"><font face="tahoma,sans-serif">Research scholar,<br>
</font></font><div><div><div><div><div><span style="color:rgb(32,18,77)">IISER, PUNE.<span style="background-color:rgb(0,0,0)"><span></span></span><span style="background-color:rgb(243,243,243)"><span></span></span></span><br>
</div></div></div></div></div></div>
</div>