<PRE>Dear all,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></PRE><PRE><SPAN style="mso-spacerun: yes"> </SPAN>I'm a new user and I'm trying to calculate the electronic properties <o:p></o:p></PRE><PRE>of rhombohedral al2o3 under R-<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:metricconverter w:st="on" ProductID="3C">3C</st1:metricconverter> symmetry group. When I optimize <o:p></o:p></PRE><PRE>these atoms, the code can't find the symmetry group (No symmetry !). <o:p></o:p></PRE><PRE>I suspect that I must be doing something wrong here. Below is my input file.<o:p></o:p></PRE><PRE>Thanks in advance,</PRE><PRE><DIV class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=FR><FONT face="Times New Roman" size=3>------------------------------------------------------------------------------------------- <FONT size=2></DIV><DIV>&control</DIV><DIV>calculation = "vc-relax"
,</DIV><DIV>restart_mode = 'from_scratch' ,</DIV><DIV>outdir='$TMP_DIR/' ,</DIV><DIV>pseudo_dir = '$PSEUDO_DIR' ,</DIV><DIV>disk_io = 'default' ,</DIV><DIV>verbosity = 'default' ,</DIV><DIV>tstress = .true. ,</DIV><DIV>tprnfor = .true. ,</DIV><DIV>nstep = 55 ,</DIV><DIV>etot_conv_thr = 1.0E-5 ,</DIV><DIV>forc_conv_thr = 1.0D-4 ,</DIV><DIV>iprint = 1 ,</DIV><DIV>max_seconds = 6000 ,</DIV><DIV>dt = 150 ,</DIV><DIV>/</DIV><DIV>&system</DIV><DIV>ibrav =4, </DIV><DIV>celldm(1) =8.98943, </DIV><DIV>celldm(3) = 2.73029,</DIV><DIV>nat=10, ntyp= 2,</DIV><DIV>ecutwfc =25.0</DIV><DIV>/</DIV><DIV>&electrons</DIV><DIV>conv_thr = 1.0d-8</DIV><DIV>mixing_beta = 0.7</DIV><DIV>/</DIV><DIV>&IONS</DIV><DIV>/</DIV><DIV>&CELL</DIV><DIV>cell_dynamics = 'damp-w' ,</DIV><DIV>press = 0.00 ,</DIV><DIV>wmass = 0.00700000 , </DIV><DIV>/</DIV><DIV>ATOMIC_SPECIES</DIV><DIV>Al 26.98 Al.vbc.UPF</DIV><DIV>O 15.999 O.pw91-van_ak.UPF</DIV><DIV>ATOMIC_POSITIONS
{crystal}</DIV><DIV>Al 0.3554 0.3554 0.3554</DIV><DIV>Al 0.1480 0.1480 0.1480</DIV><DIV>Al 0.6480 0.6480 0.6480 </DIV><DIV>Al 0.8519 0.8519 0.8519 </DIV><DIV>O 0.2500 0.9437 0.5562</DIV><DIV>O 0.9437 0.5562 0.2500</DIV><DIV>O 0.5562 0.2500 0.9437 </DIV><DIV>O 0.7500 0.0562 0.4437 </DIV><DIV>O 0.4437 0.7500 0.0562 </DIV><DIV>O 0.0562 0.4437 0.7500 </DIV><DIV>K_POINTS {automatic}</DIV><DIV>4 4 4 1 1 1</DIV><DIV>EOF</DIV><DIV> </DIV><DIV>-------------------------------------------------------------------------------</DIV></FONT></FONT></SPAN><BR><o:p></o:p></PRE><BR><BR>=======================================================<BR>Fatma Litimein <BR>Computational Materials Science Laboratory,<BR>Physics Department, University of Sidi Bel Abbes<BR>Sidi Bel Abbes, 22000 - Algeria<BR>Tel:+213 48-54-95-46 Fax:+213 48-54-19-28 <A href="mailto:flitimein@yahoo.fr">flitimein@yahoo.fr</A><BR>=======================================================<p>
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