Re: [Ifeffit] Ifeffit Digest, Vol 169, Issue 20
Hello Robert, Thanks for your help. We do not have access to ICSD at the moment, but should get it soon. I can't see the pdf that you attached. Could you send it again? Thank you very much. Regards, Abhinav On Tue, Mar 21, 2017 at 3:02 AM, <ifeffit-requ...@millenia.cars.aps.anl.gov> wrote: > Send Ifeffit mailing list submissions to > ifeffit@millenia.cars.aps.anl.gov > > To subscribe or unsubscribe via the World Wide Web, visit > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > or, via email, send a message with subject or body 'help' to > ifeffit-requ...@millenia.cars.aps.anl.gov > > You can reach the person managing the list at > ifeffit-ow...@millenia.cars.aps.anl.gov > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Ifeffit digest..." > > > Today's Topics: > >1. Re: Ifeffit Digest, Vol 169, Issue 9 (Robert Gordon) > > > -- > > Message: 1 > Date: Mon, 20 Mar 2017 12:02:41 -0700 > From: Robert Gordon <ragor...@alumni.sfu.ca> > To: XAFS Analysis using Ifeffit <ifeffit@millenia.cars.aps.anl.gov> > Subject: Re: [Ifeffit] Ifeffit Digest, Vol 169, Issue 9 > Message-ID: > <CA+FiM0HUOwyvK-=pU7Xa0UC-U=PKqeHYyu2gZ-VQgfYsxQt+7Q@mail. > gmail.com> > Content-Type: text/plain; charset="utf-8" > > Abhinav, > > As I mentioned previously, it is often helpful to check a database (i.e. > the ICSD) for a standardised form of the crystal structure. > As a courtesy, I have done that for you for this structure and attached a > pdf. You would need to enter the structural > information manually in ATOMS rather than by importing a cif file. > > Looking at the notes, the transformation from B11b to Cc is not so > straightforward. > > You should check with your institution to see if they have access to this > (ICSD) resource. > > regards, > Robert > > > On Wed, Mar 15, 2017 at 9:05 AM, Bruce Ravel <bra...@bnl.gov> wrote: > > > On 03/14/2017 06:15 AM, Abhinav Prabhakar wrote: > > > >> Attached is the CIF file in question. The crystal is Tobermorite 14A, > >> taken from COD website. > >> > >> > > Abhinav, > > > > I don't understand the contents of the CIF file in the context of the > copy > > of the International Tables that I have in front of me. The list of > > equivalent positions given in the CIF file just doesn't seem to be right > > for space group 9. > > > > The CIF file is clearly using the C axis as the unique axis since the z > > coordinate is the negated coordinate. But the list of positions does not > > correspond to any of the three cell choices. > > > > While this could be a problem in Artemis, I am inclined to think that the > > authors of the paper cited in the CIF file made some kind of non-standard > > choice for the setting of their crystal. > > > > As I said before, Artemis does what the International Tables tell it to > > do. If the author of a crystallography paper makes some non-standard > > choice, Artemis won't know how to deal with it. > > > > B > > > > > > > > -- > > Bruce Ravel bra...@bnl.gov > > > > National Institute of Standards and Technology > > Synchrotron Science Group at NSLS-II > > Building 743, Room 114 > > Upton NY, 11973 > > > > Homepage:http://bruceravel.github.io/home/ > > Software:https://github.com/bruceravel > > Demeter: http://bruceravel.github.io/demeter/ > > ___ > > Ifeffit mailing list > > Ifeffit@millenia.cars.aps.anl.gov > > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > > Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit > > > -- next part -- > An HTML attachment was scrubbed... > URL: <http://millenia.cars.aps.anl.gov/pipermail/ifeffit/ > attachments/20170320/7f692aa4/attachment.html> > -- next part -- > A non-text attachment was scrubbed... > Name: FIZ Karlsruhe ICSD_ Detailed View Collection Code 152489.pdf > Type: application/pdf > Size: 130405 bytes > Desc: not available > URL: <http://millenia.cars.aps.anl.gov/pipermail/ifeffit/ > attachments/20170320/7f692aa4/attachment.pdf> > > -- > > Subject: Digest Footer > > ___ > Ifeffit mailing list > Ifeffit@millenia.cars.aps.anl.gov > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit > > > -- > > End of Ifeffit Digest, Vol 169, Issue 20 > > -- *Abhinav Prabhakar* ___ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit
Re: [Ifeffit] Ifeffit Digest, Vol 169, Issue 9
Hello, Thank you for your reply. Attached is the CIF file in question. The crystal is Tobermorite 14A, taken from COD website. However, the structure has partial occupancy and it is modified to include full occupancy. The modified CIF file shows a space group of B11b (and cannot be recognized by Artemis). I tried a C1c1 space group (it works) but it shows the same structural values as a P11b. Regards, AP On Tue, Mar 14, 2017 at 1:00 AM, <ifeffit-requ...@millenia.cars.aps.anl.gov> wrote: > Send Ifeffit mailing list submissions to > ifeffit@millenia.cars.aps.anl.gov > > To subscribe or unsubscribe via the World Wide Web, visit > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > or, via email, send a message with subject or body 'help' to > ifeffit-requ...@millenia.cars.aps.anl.gov > > You can reach the person managing the list at > ifeffit-ow...@millenia.cars.aps.anl.gov > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Ifeffit digest..." > > > Today's Topics: > >1. Re: Space group type in Artemis (Bruce Ravel) >2. Data export and coordination number (Abhinav Prabhakar) >3. Re: Data export and coordination number (Bruce Ravel) > > > -- > > Message: 1 > Date: Mon, 13 Mar 2017 09:20:14 -0400 > From: Bruce Ravel <bra...@bnl.gov> > To: XAFS Analysis using Ifeffit <ifeffit@millenia.cars.aps.anl.gov> > Subject: Re: [Ifeffit] Space group type in Artemis > Message-ID: <3853f1f7-61fd-6886-306f-040c540ec...@bnl.gov> > Content-Type: text/plain; charset=windows-1252; format=flowed > > On 03/11/2017 05:56 AM, Abhinav Prabhakar wrote: > > Hello, > > > > I have a question about the working of Artemis as a new user. > > > > Artemis does not recognize the space group B11b. When importing a cif > > file of a crystal with this symmetry, it sends a prompt message that the > > space group symbol cannot be recognized. As a result, I changed it to > > P11b and it works. But would this change any crystal information (for > > eg. Degen, Reff values) significantly? > > I am not a crystallography expert in any sense. When I wrote Artemis, I > meticulously followed what I found in the fourth edition of the > International Tables for Crystallography, Volume A. Every symbol > defined in there is recognized by Artemis. (Well, I guess I should say > that every symbol is /supposed to be/ recognized by Artemis. If one is > missing, that's a bug and should be reported.) > > "B11b" is not a symbol that I found in my copy of ITC volume A. As > Robert suggested, there may be a way to rotate group 9 so that "B11b" is > an interpretable symbol in the abstract. But Artemis does not know how > to do that. (Nor do I.) > > "P11b" is a setting for space group #7. If, as Robert suggests, your > CIF file is for space group #9, then the answer to your last question is > yes. It is plainly obvious that using a different space group will > change the degeneracies and distances. > > > Of course, you did not bother to include a copy of the CIF file in > question to your original email, so it is not actually possible for > Robert or I or anyone else to actually help you effectively. > > At the risk of sounding like an annoyingly broken record, everyone > should take the time to ask a good question or write an actionable bug > report: > >http://bruceravel.github.io/demeter/documents/SinglePage/help.html >http://bruceravel.github.io/demeter/documents/SinglePage/bugs.html > > B > > > -- > Bruce Ravel bra...@bnl.gov > > National Institute of Standards and Technology > Synchrotron Science Group at NSLS-II > Building 743, Room 114 > Upton NY, 11973 > > Homepage:http://bruceravel.github.io/home/ > Software:https://github.com/bruceravel > Demeter: http://bruceravel.github.io/demeter/ > > > -- > > Message: 2 > Date: Mon, 13 Mar 2017 21:48:31 +0800 > From: Abhinav Prabhakar <abhi.prabha...@gmail.com> > To: ifeffit@millenia.cars.aps.anl.gov > Subject: [Ifeffit] Data export and coordination number > Message-ID: > <CA+nbL85FJReunY1Am1oeNTMtFskXMd8FmH_OgaO00mnmew2c-g@mail.gmail. > com> > Content-Type: text/plain; charset="utf-8" > > Hello, > > As a new user, I have some questions related to the use of Athena and > Artemis: > > i) Is it possible to extract the normalized/background corrected data from > Athena (in E-,k- and R- spac
[Ifeffit] Data export and coordination number
Hello, As a new user, I have some questions related to the use of Athena and Artemis: i) Is it possible to extract the normalized/background corrected data from Athena (in E-,k- and R- space) and export it as numbers (to Excel perhaps)? ii) Using Artemis, how can coordination numbers (N) be expressed as 'guess' parameters (Artemis allows only numerical values for N)? Thank you. Regards, Abhinav Prabhakar (Mr.) ___ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit
[Ifeffit] Space group type in Artemis
Hello, I have a question about the working of Artemis as a new user. Artemis does not recognize the space group B11b. When importing a cif file of a crystal with this symmetry, it sends a prompt message that the space group symbol cannot be recognized. As a result, I changed it to P11b and it works. But would this change any crystal information (for eg. Degen, Reff values) significantly? Thank you. Regards, Abhinav Prabhakar (Mr) ___ Ifeffit mailing list Ifeffit@millenia.cars.aps.anl.gov http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit Unsubscribe: http://millenia.cars.aps.anl.gov/mailman/options/ifeffit
