<div dir="ltr"><div>Dear Mighfar Imam,<br></div> Thank you very much for your kind reply.<br><br>Best regards,<br> Neha Bothra,<br> Ph.D student,<br> JNCASR,<br>
Bengaluru, India.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Sep 28, 2016 at 3:30 PM, <span dir="ltr"><<a href="mailto:pw_forum-request@pwscf.org" target="_blank">pw_forum-request@pwscf.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Send Pw_forum mailing list submissions to<br>
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Today's Topics:<br>
<br>
1. supercell and vacuum (Lorenzo Pedrazzetti)<br>
2. how to consider disordered crystal structure (Neha Bothra)<br>
3. Re: supercell and vacuum (Stefano de Gironcoli)<br>
4. Re: supercell and vacuum (Stefano de Gironcoli)<br>
5. Re: supercell and vacuum (Dae Kwang Jun)<br>
6. Re: supercell and vacuum (Jess Wellendorff)<br>
7. Re: Lower limit of target pressure (Subhodip Chatterjee)<br>
8. Re: Lower limit of target pressure (Paolo Giannozzi)<br>
9. Re: how to consider disordered crystal structure (<a href="mailto:mimam@ictp.it">mimam@ictp.it</a>)<br>
10. Re: Lower limit of target pressure (Subhodip Chatterjee)<br>
<br>
<br>
------------------------------<wbr>------------------------------<wbr>----------<br>
<br>
Message: 1<br>
Date: Wed, 28 Sep 2016 04:51:58 +0000<br>
From: Lorenzo Pedrazzetti <<a href="mailto:lorenzo.pedrazzetti@polimi.it">lorenzo.pedrazzetti@polimi.it</a><wbr>><br>
Subject: [Pw_forum] supercell and vacuum<br>
To: "<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>" <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br>
Message-ID: <<a href="mailto:44rkccrstkwm9yx3mi51kmyg.1475038291492@email.android.com">44rkccrstkwm9yx3mi51kmyg.<wbr>1475038291492@email.android.<wbr>com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Goodmorning qe community,<br>
I created an interface metal/semic by using virtual nanolab; when I come to check my structure with xcrysden I notice that, when vacuum is added enlarging the corresponding CELL_PARAMETERS component, all my atoms move along that direction, effectively expanding the cell instead of introducing vacuum layers.<br>
Where do I mess up? I thought the system is such that fixed celldm () and ATOMIC_POSITIONS all atoms should not move anymore.<br>
Thanks, have a nice day.<br>
<br>
Sent from my ASUS<br>
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Message: 2<br>
Date: Wed, 28 Sep 2016 10:35:14 +0530<br>
From: Neha Bothra <<a href="mailto:neha3bothra@gmail.com">neha3bothra@gmail.com</a>><br>
Subject: [Pw_forum] how to consider disordered crystal structure<br>
To: <a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a><br>
Message-ID:<br>
<<a href="mailto:CAC2yGDD6uCotMqc086By2yip46wZ0kMxGt5mgfYvSz4FHqU%2Bug@mail.gmail.com">CAC2yGDD6uCotMqc086By2yip46wZ<wbr>0kMxGt5mgfYvSz4FHqU+ug@mail.<wbr>gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Dear All,<br>
I am trying to make a structure of *CeAgGa3 compound* from the<br>
following cif file in which *two different atoms have same configurations*.<br>
But I don't know how to do it? Can any one help?<br>
<br>
The coordinations are as follows:<br>
Ce 0.00000000 0.00000000 0.00000000<br>
Ga 0.00000000 2.16475000 2.70417500<br>
Ag 0.00000000 2.16475000 2.70417500<br>
Ga 0.00000000 0.00000000 4.17200119<br>
<br>
Thank you in advance for any helps regarding my request.<br>
<br>
Best regards,<br>
Neha Bothra,<br>
Ph.D student,<br>
JNCASR,<br>
Bengaluru, India.<br>
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Message: 3<br>
Date: Wed, 28 Sep 2016 08:18:01 +0200<br>
From: Stefano de Gironcoli <<a href="mailto:degironc@sissa.it">degironc@sissa.it</a>><br>
Subject: Re: [Pw_forum] supercell and vacuum<br>
To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br>
Message-ID: <<a href="mailto:02A42E67-8ADB-45C6-8FDA-4CF6D45C4D9A@sissa.it">02A42E67-8ADB-45C6-8FDA-<wbr>4CF6D45C4D9A@sissa.it</a>><br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
Looks like a problem in how you 'add vacuum' In your virtual nanolab step. Difficult to say without further information.<br>
<br>
stefano<br>
(sent from my phone)<br>
<br>
> On 28 Sep 2016, at 06:51, Lorenzo Pedrazzetti <<a href="mailto:lorenzo.pedrazzetti@polimi.it">lorenzo.pedrazzetti@polimi.it</a><wbr>> wrote:<br>
><br>
> Goodmorning qe community,<br>
> I created an interface metal/semic by using virtual nanolab; when I come to check my structure with xcrysden I notice that, when vacuum is added enlarging the corresponding CELL_PARAMETERS component, all my atoms move along that direction, effectively expanding the cell instead of introducing vacuum layers.<br>
> Where do I mess up? I thought the system is such that fixed celldm () and ATOMIC_POSITIONS all atoms should not move anymore.<br>
> Thanks, have a nice day.<br>
><br>
> Sent from my ASUS<br>
> ______________________________<wbr>_________________<br>
> Pw_forum mailing list<br>
> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
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Message: 4<br>
Date: Wed, 28 Sep 2016 08:21:16 +0200<br>
From: Stefano de Gironcoli <<a href="mailto:degironc@sissa.it">degironc@sissa.it</a>><br>
Subject: Re: [Pw_forum] supercell and vacuum<br>
To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br>
Message-ID: <<a href="mailto:33895D6F-F2FE-47A4-BB1C-1788DF460902@sissa.it">33895D6F-F2FE-47A4-BB1C-<wbr>1788DF460902@sissa.it</a>><br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
Are your atomic positions given in alat or crystal setting ? Understand the difference between the two options<br>
<br>
stefano<br>
(sent from my phone)<br>
<br>
> On 28 Sep 2016, at 06:51, Lorenzo Pedrazzetti <<a href="mailto:lorenzo.pedrazzetti@polimi.it">lorenzo.pedrazzetti@polimi.it</a><wbr>> wrote:<br>
><br>
> Goodmorning qe community,<br>
> I created an interface metal/semic by using virtual nanolab; when I come to check my structure with xcrysden I notice that, when vacuum is added enlarging the corresponding CELL_PARAMETERS component, all my atoms move along that direction, effectively expanding the cell instead of introducing vacuum layers.<br>
> Where do I mess up? I thought the system is such that fixed celldm () and ATOMIC_POSITIONS all atoms should not move anymore.<br>
> Thanks, have a nice day.<br>
><br>
> Sent from my ASUS<br>
> ______________________________<wbr>_________________<br>
> Pw_forum mailing list<br>
> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
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<br>
Message: 5<br>
Date: Wed, 28 Sep 2016 15:21:42 +0900<br>
From: Dae Kwang Jun <<a href="mailto:jdaekwang@gmail.com">jdaekwang@gmail.com</a>><br>
Subject: Re: [Pw_forum] supercell and vacuum<br>
To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br>
Message-ID:<br>
<CAC+GeGrRzYxtQYNJO0++eirXqdC=<wbr>8CdqVdAXPKTnrQ+XK=<a href="mailto:rLpQ@mail.gmail.com">rLpQ@mail.<wbr>gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
On Wednesday, 28 September 2016, Stefano de Gironcoli <<a href="mailto:degironc@sissa.it">degironc@sissa.it</a>><br>
wrote:<br>
<br>
> Looks like a problem in how you 'add vacuum' In your virtual nanolab step.<br>
> Difficult to say without further information.<br>
><br>
> stefano<br>
> (sent from my phone)<br>
><br>
> On 28 Sep 2016, at 06:51, Lorenzo Pedrazzetti <<br>
> <a href="mailto:lorenzo.pedrazzetti@polimi.it">lorenzo.pedrazzetti@polimi.it</a><br>
> <javascript:_e(%7B%7D,'cvml','<a href="mailto:lorenzo.pedrazzetti@polimi.it"><wbr>lorenzo.pedrazzetti@polimi.it</a>'<wbr>);>> wrote:<br>
><br>
> Goodmorning qe community,<br>
> I created an interface metal/semic by using virtual nanolab; when I come<br>
> to check my structure with xcrysden I notice that, when vacuum is added<br>
> enlarging the corresponding CELL_PARAMETERS component, all my atoms move<br>
> along that direction, effectively expanding the cell instead of introducing<br>
> vacuum layers.<br>
> Where do I mess up? I thought the system is such that fixed celldm () and<br>
> ATOMIC_POSITIONS all atoms should not move anymore.<br>
> Thanks, have a nice day.<br>
><br>
> Sent from my ASUS<br>
><br>
> ______________________________<wbr>_________________<br>
> Pw_forum mailing list<br>
> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a> <javascript:_e(%7B%7D,'cvml','<a href="mailto:Pw_forum@pwscf.org"><wbr>Pw_forum@pwscf.org</a>');><br>
> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
><br>
> Dear Lorenzo<br>
<br>
It is possible that you are using fractional coordinates. Try checking the<br>
settings and the units.<br>
<br>
Sincerely,<br>
<br>
Dae Kwang Jun<br>
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<br>
Message: 6<br>
Date: Wed, 28 Sep 2016 08:23:17 +0200<br>
From: Jess Wellendorff <<a href="mailto:jess.wellendorff@quantumwise.com">jess.wellendorff@quantumwise.<wbr>com</a>><br>
Subject: Re: [Pw_forum] supercell and vacuum<br>
To: <a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a><br>
Message-ID: <<a href="mailto:820da64d-1b95-85a5-2ebc-7da6cf2c2d93@quantumwise.com">820da64d-1b95-85a5-2ebc-<wbr>7da6cf2c2d93@quantumwise.com</a>><br>
Content-Type: text/plain; charset="windows-1252"<br>
<br>
Dear Lorenzo.<br>
<br>
If this is indeed a problem related to Virtual NanoLab, I will be happy<br>
to try to help you out. Could you give more details on what you did in<br>
VNL? And preferably also attach the generated PWscf input file.<br>
<br>
--<br>
Jess Wellendorff<br>
Scientific Specialist<br>
QuantumWise A/S<br>
Fruebjergvej 3, Postbox 4<br>
2100 Copenhagen, Denmark<br>
Web: <a href="http://www.quantumwise.com" rel="noreferrer" target="_blank">www.quantumwise.com</a><br>
Email: <a href="mailto:jess.wellendorff@quantumwise.com">jess.wellendorff@quantumwise.<wbr>com</a><br>
Tel: +45 69901888<br>
--<br>
<br>
<br>
<br>
On 09/28/2016 08:18 AM, Stefano de Gironcoli wrote:<br>
> Looks like a problem in how you 'add vacuum' In your virtual nanolab<br>
> step. Difficult to say without further information.<br>
><br>
> stefano<br>
> (sent from my phone)<br>
><br>
> On 28 Sep 2016, at 06:51, Lorenzo Pedrazzetti<br>
> <<a href="mailto:lorenzo.pedrazzetti@polimi.it">lorenzo.pedrazzetti@polimi.it</a> <mailto:<a href="mailto:lorenzo.pedrazzetti@polimi.it">lorenzo.pedrazzetti@<wbr>polimi.it</a>>><br>
> wrote:<br>
><br>
>> Goodmorning qe community,<br>
>> I created an interface metal/semic by using virtual nanolab; when I<br>
>> come to check my structure with xcrysden I notice that, when vacuum<br>
>> is added enlarging the corresponding CELL_PARAMETERS component, all<br>
>> my atoms move along that direction, effectively expanding the cell<br>
>> instead of introducing vacuum layers.<br>
>> Where do I mess up? I thought the system is such that fixed celldm ()<br>
>> and ATOMIC_POSITIONS all atoms should not move anymore.<br>
>> Thanks, have a nice day.<br>
>><br>
>> Sent from my ASUS<br>
>> ______________________________<wbr>_________________<br>
>> Pw_forum mailing list<br>
>> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a> <mailto:<a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a>><br>
>> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
><br>
><br>
> ______________________________<wbr>_________________<br>
> Pw_forum mailing list<br>
> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
<br>
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Message: 7<br>
Date: Wed, 28 Sep 2016 13:12:51 +0530<br>
From: Subhodip Chatterjee <<a href="mailto:subhopcqc@gmail.com">subhopcqc@gmail.com</a>><br>
Subject: Re: [Pw_forum] Lower limit of target pressure<br>
To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br>
Message-ID:<br>
<CAAuJ=<a href="mailto:OTfRzBLnwDhPbq6_xcW1ypur9dhEghqTHeSUxvDB_LSyg@mail.gmail.com">OTfRzBLnwDhPbq6_<wbr>xcW1ypur9dhEghqTHeSUxvDB_LSyg@<wbr>mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Dear Paolo,<br>
<br>
I want to add few more informations.<br>
<br>
After the vc-relax calculation, the magnitude of pressure is -*0.02 kbar*.<br>
<br>
And what I mentioned in my last post (i.e. *3.61 kbar*) is the pressure<br>
after the final SCF calculation.<br>
<br>
It will be a big help if you can guide me to solve this issue.<br>
<br>
Best regards<br>
Subhodip<br>
<br>
On Mon, Sep 26, 2016 at 11:24 AM, Subhodip Chatterjee <<a href="mailto:subhopcqc@gmail.com">subhopcqc@gmail.com</a>><br>
wrote:<br>
<br>
> INPUT<br>
><br>
> *press = 0.001*<br>
> *press_conv_thr = 0.0001*<br>
><br>
> OUTPUT<br>
> *P (kbar) = 3.61*<br>
><br>
> Best regards<br>
> Subhodip<br>
><br>
> On Sat, Sep 24, 2016 at 7:15 PM, Paolo Giannozzi <<a href="mailto:p.giannozzi@gmail.com">p.giannozzi@gmail.com</a>><br>
> wrote:<br>
><br>
>> "A lot" = how much? the default tolerance on pressure convergence is 0.5<br>
>> KBar<br>
>><br>
>><br>
>> Paolo<br>
>><br>
>> On Sat, Sep 24, 2016 at 8:39 AM, Subhodip Chatterjee <<a href="mailto:subhopcqc@gmail.com">subhopcqc@gmail.com</a><br>
>> > wrote:<br>
>><br>
>>> Dear PWSCF developers,<br>
>>><br>
>>> Is there any restriction in the code for the "press" (target pressure)<br>
>>> input?<br>
>>><br>
>>> I successfully get my vc-relax calculations converged to desired<br>
>>> pressure values as high as several terapascal, however, when I set a low<br>
>>> enough value, e.g. 1 bar (i.e. press = 0.001), the final pressure in the<br>
>>> output differs a lot!<br>
>>><br>
>>> Best regards<br>
>>> Subhodip<br>
>>><br>
>>> --<br>
>>> *Subhodip Chatterjee*<br>
>>><br>
>>> *Senior Research Fellow*<br>
>>><br>
>>> *Department of Chemistry*<br>
>>> *University of Calcutta*<br>
>>> *Kolkata, India*<br>
>>><br>
>>> ______________________________<wbr>_________________<br>
>>> Pw_forum mailing list<br>
>>> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
>>> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
>>><br>
>><br>
>><br>
>><br>
>> --<br>
>> Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>
>> Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>
>> Phone +39-0432-558216, fax +39-0432-558222<br>
>><br>
>><br>
>> ______________________________<wbr>_________________<br>
>> Pw_forum mailing list<br>
>> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
>> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
>><br>
><br>
><br>
><br>
> --<br>
> *Subhodip Chatterjee*<br>
><br>
> *Senior Research Fellow*<br>
><br>
> *Department of Chemistry*<br>
> *University of Calcutta*<br>
> *Kolkata, India*<br>
><br>
<br>
<br>
<br>
--<br>
*Subhodip Chatterjee*<br>
<br>
*Senior Research Fellow*<br>
<br>
*Department of Chemistry*<br>
*University of Calcutta*<br>
*Kolkata, India*<br>
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<br>
Message: 8<br>
Date: Wed, 28 Sep 2016 09:58:14 +0200<br>
From: Paolo Giannozzi <<a href="mailto:p.giannozzi@gmail.com">p.giannozzi@gmail.com</a>><br>
Subject: Re: [Pw_forum] Lower limit of target pressure<br>
To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br>
Message-ID:<br>
<<a href="mailto:CAPMgbCvKb%2Bz0LYRvC21%2BUmJbKvpsMjFNwMJc6OcbBdyuQcYpwg@mail.gmail.com">CAPMgbCvKb+z0LYRvC21+<wbr>UmJbKvpsMjFNwMJc6OcbBdyuQcYpwg<wbr>@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
You already solved the "issue": the variable-cell optimization is done<br>
with the plane-wave basis set for the starting cell, while the last step is<br>
done with the plane-wave basis set for the final cell. The two differ by a<br>
little bit (unless the cutoff is so high to guarantee perfect convergence<br>
in both cases). Search for "Pulay stress"in the literature.<br>
<br>
Paolo<br>
<br>
On Wed, Sep 28, 2016 at 9:42 AM, Subhodip Chatterjee <<a href="mailto:subhopcqc@gmail.com">subhopcqc@gmail.com</a>><br>
wrote:<br>
<br>
> Dear Paolo,<br>
><br>
> I want to add few more informations.<br>
><br>
> After the vc-relax calculation, the magnitude of pressure is -*0.02 kbar*<br>
> .<br>
><br>
> And what I mentioned in my last post (i.e. *3.61 kbar*) is the pressure<br>
> after the final SCF calculation.<br>
><br>
> It will be a big help if you can guide me to solve this issue.<br>
><br>
> Best regards<br>
> Subhodip<br>
><br>
> On Mon, Sep 26, 2016 at 11:24 AM, Subhodip Chatterjee <<a href="mailto:subhopcqc@gmail.com">subhopcqc@gmail.com</a><br>
> > wrote:<br>
><br>
>> INPUT<br>
>><br>
>> *press = 0.001*<br>
>> *press_conv_thr = 0.0001*<br>
>><br>
>> OUTPUT<br>
>> *P (kbar) = 3.61*<br>
>><br>
>> Best regards<br>
>> Subhodip<br>
>><br>
>> On Sat, Sep 24, 2016 at 7:15 PM, Paolo Giannozzi <<a href="mailto:p.giannozzi@gmail.com">p.giannozzi@gmail.com</a>><br>
>> wrote:<br>
>><br>
>>> "A lot" = how much? the default tolerance on pressure convergence is 0.5<br>
>>> KBar<br>
>>><br>
>>><br>
>>> Paolo<br>
>>><br>
>>> On Sat, Sep 24, 2016 at 8:39 AM, Subhodip Chatterjee <<br>
>>> <a href="mailto:subhopcqc@gmail.com">subhopcqc@gmail.com</a>> wrote:<br>
>>><br>
>>>> Dear PWSCF developers,<br>
>>>><br>
>>>> Is there any restriction in the code for the "press" (target pressure)<br>
>>>> input?<br>
>>>><br>
>>>> I successfully get my vc-relax calculations converged to desired<br>
>>>> pressure values as high as several terapascal, however, when I set a low<br>
>>>> enough value, e.g. 1 bar (i.e. press = 0.001), the final pressure in the<br>
>>>> output differs a lot!<br>
>>>><br>
>>>> Best regards<br>
>>>> Subhodip<br>
>>>><br>
>>>> --<br>
>>>> *Subhodip Chatterjee*<br>
>>>><br>
>>>> *Senior Research Fellow*<br>
>>>><br>
>>>> *Department of Chemistry*<br>
>>>> *University of Calcutta*<br>
>>>> *Kolkata, India*<br>
>>>><br>
>>>> ______________________________<wbr>_________________<br>
>>>> Pw_forum mailing list<br>
>>>> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
>>>> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
>>>><br>
>>><br>
>>><br>
>>><br>
>>> --<br>
>>> Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>
>>> Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>
>>> Phone +39-0432-558216, fax +39-0432-558222<br>
>>><br>
>>><br>
>>> ______________________________<wbr>_________________<br>
>>> Pw_forum mailing list<br>
>>> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
>>> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
>>><br>
>><br>
>><br>
>><br>
>> --<br>
>> *Subhodip Chatterjee*<br>
>><br>
>> *Senior Research Fellow*<br>
>><br>
>> *Department of Chemistry*<br>
>> *University of Calcutta*<br>
>> *Kolkata, India*<br>
>><br>
><br>
><br>
><br>
> --<br>
> *Subhodip Chatterjee*<br>
><br>
> *Senior Research Fellow*<br>
><br>
> *Department of Chemistry*<br>
> *University of Calcutta*<br>
> *Kolkata, India*<br>
><br>
> ______________________________<wbr>_________________<br>
> Pw_forum mailing list<br>
> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
><br>
<br>
<br>
<br>
--<br>
Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>
Phone +39-0432-558216, fax +39-0432-558222<br>
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Message: 9<br>
Date: Wed, 28 Sep 2016 11:31:58 +0200<br>
From: <a href="mailto:mimam@ictp.it">mimam@ictp.it</a><br>
Subject: Re: [Pw_forum] how to consider disordered crystal structure<br>
To: "PWSCF Forum" <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br>
Message-ID:<br>
<<a href="mailto:af3aa4b1138602980a4d205736dfcc91.squirrel@webmail.ictp.it">af3aa4b1138602980a4d205736dfc<wbr>c91.squirrel@webmail.ictp.it</a>><br>
Content-Type: text/plain;charset=iso-8859-1<br>
<br>
I guess this is from a VASP input file.<br>
This is VASP's way of using virtual crystal approximation: It does not use<br>
a "virtual atom", rather puts the real atoms at the same position with<br>
weighted pseudopotentials in the INCAR file.<br>
<br>
HTH<br>
Mighfar<br>
<br>
<br>
> Dear All,<br>
> I am trying to make a structure of *CeAgGa3 compound* from the<br>
> following cif file in which *two different atoms have same<br>
> configurations*.<br>
> But I don't know how to do it? Can any one help?<br>
><br>
> The coordinations are as follows:<br>
> Ce 0.00000000 0.00000000 0.00000000<br>
> Ga 0.00000000 2.16475000 2.70417500<br>
> Ag 0.00000000 2.16475000 2.70417500<br>
> Ga 0.00000000 0.00000000 4.17200119<br>
><br>
> Thank you in advance for any helps regarding my request.<br>
><br>
> Best regards,<br>
> Neha Bothra,<br>
> Ph.D student,<br>
> JNCASR,<br>
> Bengaluru, India.<br>
> ______________________________<wbr>_________________<br>
> Pw_forum mailing list<br>
> <a href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
> <a href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer" target="_blank">http://pwscf.org/mailman/<wbr>listinfo/pw_forum</a><br>
<br>
<br>
--<br>
Mighfar Imam,<br>
Postdoc<br>
MRC, IISc, Bangalore.<br>
<br>
<br>
<br>
<br>
------------------------------<br>
<br>
Message: 10<br>
Date: Wed, 28 Sep 2016 09:32:06 +0000<br>
From: Subhodip Chatterjee <<a href="mailto:subhopcqc@gmail.com">subhopcqc@gmail.com</a>><br>
Subject: Re: [Pw_forum] Lower limit of target pressure<br>
To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br>
Message-ID:<br>
<CAAuJ=OQ7SrHBvEqDrmG2-1H+K+<wbr>T3N=d4E2pwjAo_8M3da=<a href="mailto:p2Kw@mail.gmail.com">p2Kw@mail.<wbr>gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Dear Paolo,<br>
<br>
Thanks for your reply. But the main problem is not solved, because none of<br>
the two values are appropriate with respect to the input, i.e. target<br>
pressure of 0.001 kbar with a pressure convergence threshold of 0.0001 kbar!<br>
<br>
What changes in the input are needed to get the optimized geometry at 0.001<br>
kbar pressure?<br>
<br>
Best regards<br>
Subhodip<br>
<br>
--<br>
*Subhodip Chatterjee*<br>
<br>
*Senior Research Fellow*<br>
<br>
*Department of Chemistry*<br>
*University of Calcutta*<br>
*Kolkata, India*<br>
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</blockquote></div><br></div>