<span class="Apple-style-span" style="border-collapse:collapse;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><div><span class="Apple-style-span" style="border-collapse:collapse;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">As S. Baroni noticed with better aye than me, "O" is different from "0", but also you have set too many atoms positions are equivalent due to translational symmetry. </span></div>
<div><span class="Apple-style-span" style="border-collapse:collapse;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">Positions (0,0,0), (1,0,0), (0,1,0), etc are the same. </span></div><div><span class="Apple-style-span" style="border-collapse:collapse;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px">Also, with ibrav=2, you need to set only the positions of ONE Ga and ONE As in the primitive unit cell, and also nat=2.</span></div>
<div><br></div>ATOMIC_POSITIONS {crystal} <br>Ga 0.O 0.0 1.0 <br>Ga 1.0 0.0 0.0 <br>Ga 0.5 0.0 0.5 <br>As 0.75 0.25 0.75 <br>As 0.25 0.25 0.25 <br>Ga 0.5 0.5 1.0 <br>Ga 1.0 0.5 0.5 <br>As 0.25 0.75 0.75 <br>As 0.75 0.75 0.25<br>
Ga 0.0 1.0 0.0 </span><span class="Apple-style-span" style="border-collapse:collapse;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><div><span class="Apple-style-span" style="border-collapse:collapse;color:rgb(34,34,34);font-family:arial,sans-serif;font-size:13px"><br>
</span></div>---------- Mensaje reenviado ----------<br>From: Kajal Jindal <<a href="mailto:kajalmh18@gmail.com">kajalmh18@gmail.com</a>><br>To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br>
Cc: <br>Date: Tue, 25 Sep 2012 16:07:03 +0530<br>Subject: [Pw_forum] Error while parsing atomic positions<br>Hi,<br><br>I am trying to do the scf calculation on unit cell GaAs. But i am continously observing an error "Error while parsing atomic positions" while running it. I have checked the program several times but still not able to troubleshoot. I am attaching my input and output file result along.<br>
<br><font size="4"><b>input file</b></font><br><br>&control <br> calculation='scf' <br> restart_mode='from_scratch' <br> prefix='GaAs' <br> wf_collect=.true., <br> pseudo_dir = '/root/pseudo', <br>
outdir='/root/poonamGaAs/temp', <br> <br> / <br> &system <br> ibrav=2, nat=10, ntyp= 2,celldm(1) = 10.20, <br> ecutwfc = 25.0,ecutrho=300, occupations ='fixed', <br> <br> / <br> &electrons <br>
mixing_beta = 0.1 <br> mixing_mode = 'plain' <br> conv_thr = 1.0e-5 <br> diagonalization = 'david' <br> / <br> <br>ATOMIC_SPECIES <br>Ga 69.72 Ga.pbe-n-van.UPF <br>As 74.92 As.pbe-n-van.UPF <br>
ATOMIC_POSITIONS {crystal} <br>Ga 0.O 0.0 1.0 <br>Ga 1.0 0.0 0.0 <br>Ga 0.5 0.0 0.5 <br>As 0.75 0.25 0.75 <br>As 0.25 0.25 0.25 <br>Ga 0.5 0.5 1.0 <br>Ga 1.0 0.5 0.5 <br>As 0.25 0.75 0.75 <br>As 0.75 0.75 0.25<br>
Ga 0.0 1.0 0.0 <br> <br> <br>K_POINTS {automatic} <br>4 4 2 0 0 0 </span><br clear="all"><div><br></div>-- <br><div><br></div>
<div><br></div>Eduardo Menendez Proupin<div>Departamento de Química Fisica Aplicada<br>Facultad de Ciencias<br>Universidad Autónoma de Madrid<br>28049 Madrid, Spain<br></div><div>Phone: +34 91 497 6706</div><div><br></div>
<div>On leave from: Departamento de Fisica, Facultad de Ciencias, Universidad de Chile URL: <a href="http://fisica.ciencias.uchile.cl/%7Eemenendez" target="_blank">http://fisica.ciencias.uchile.cl/~emenendez</a><div><br></div>
<div><span style="font-family:sans-serif;font-size:13px;line-height:19px">"<i>Padece, espera y trabaja para gentes que nunca conocerá y que a su vez padecerán, esperarán y trabajarán para otros, que tampoco serán felices, pues el hombre ansía siempre una felicidad situada más allá de la porción que le es otorgada. Pero la grandeza del hombre está precisamente en querer mejorar lo que es. En imponerse Tareas. En el Reino de los Cielos no hay grandeza que conquistar, puesto que allá todo es jerarquía establecida, incógnita despejada, existir sin término, imposibilidad de sacrificio, reposo y deleite. Por ello, agobiado de penas y de Tareas, hermoso dentro de su miseria, capaz de amar en medio de las plagas, el hombre puede hallar su grandeza, su máxima medida en el Reino de este Mundo</i>".</span></div>
<div><span style="font-family:sans-serif;font-size:13px;line-height:19px">Alejo Carpentier, El reino de este mundo, (1949).<br><br></span>"...man never knows for who he suffers and waits. He suffers and waits
and works for peoples he will never meet, and who at the same time will
suffer and wait and work for others who will also not be happy, as man
always desires a happiness that is beyond the lot that he is given. But
the greatness of man is precisely in wanting to improve what he is. In
assigning himself Tasks. In the Kingdom of Heaven there is no greatness
to conquer, for everything there is an established hierarchy, the
unknown is unobscured, existence is without end, sacrifice, rest, and
delight are impossibilities. Therefore, overwhelmed with hardships and
Tasks, beautiful within his misery, capable of loving in the middle of
calamity, man can only find his greatness, his full self-realization, in
the Kingdom of this World." - Alejo Carpentier<br></div></div><br>