Re: Rietveld question - EXPGUI

2004-03-19 Thread Radovan Cerny
Dear Larry, I can only say: do not worry. There is a lot of very good crystallographers who are also very good programers among the young generation. The evolution will not stop! Best regards Radovan, crystallographer from a middle-age generation Larry W. Finger a écrit: I am going to give

Re: Rietveld question - EXPGUI

2004-03-18 Thread Larry W. Finger
I am going to give up my 'lurker' status on this mailing list to switch this thread to a more philosophical vein. In the past generation, many good crystallographers have also been good programmers. I suspect it was easier to learn programming than it was to teach crystallography to a program

Re: Rietveld question - EXPGUI

2004-03-18 Thread Alan Hewat
At 19:41 17/03/2004, Nichole Wonderling wrote: >As I am not a crystallographer, and have very limited experience with space group >terminology, is there a good resource to confirm that I have entered the space group >properly? You really do need a basic understanding of what you are doing with R

RE: Rietveld question - EXPGUI

2004-03-17 Thread Peter Zavalij
The best way is to check generated symmetry operations with International tables for crystallography or on-line using, for example, Bilbao server: http://www.cryst.ehu.es/cryst/get_gen.html which has all conventional and non-conventional settings and much more. Peter Dr. Peter Y. Zavalij Un

Re: Rietveld question - EXPGUI

2004-03-17 Thread Nichole Wonderling
Thank you Peter and Allen.   I see that this indeed does make a difference.  Can you tell me how I check the space group to ensure that it is correct?  As I am not a crystallographer, and have very limited experience with space group terminology, is there a good resource to confirm that I have en

Re: Rietveld question - EXPGUI

2004-03-17 Thread Allen Larson
Alan Hewat wrote: > > >I'm trying to do some refinement on Zr-Y-O powders. I keep getting an error for > >the space group P 42 / n m c S when I try to import the *.cif file for ICSD 90885 > >into EXPGUI. Can someone tell me why? > > >It seems I may have answered my own question. A space seems

Re: Rietveld question - EXPGUI

2004-03-17 Thread Alan Hewat
>I'm trying to do some refinement on Zr-Y-O powders. I keep getting an error for the >space group P 42 / n m c S when I try to import the *.cif file for ICSD 90885 into >EXPGUI. Can someone tell me why? >It seems I may have answered my own question. A space seems to be needed between the >4