Hi, The XXI IUCr meeting, Osaka, was full of novelties. Rather than to admit them without any discussion, let us have a closer look. Feel free to send comments...
Dear All, if you have GULP (General Utility Lattice Program) package, please give me the details of it, where It will be available for windows or linux...
Murugesan S
muruges@...
Sep 11, 2008 6:16 am
2236
... https://www.ivec.org/gulp/ It's free for academics. -- Vincent Favre-Nicolin http://vincefn.net Université Joseph Fourier...
Favre-Nicolin Vincent
vincefn@...
Sep 11, 2008 7:32 am
2237
A quick announcement that the preliminary information for the 2009 Annual Meeting of the American Crystallographic Association is available on the conference...
New book about Powder Diffraction : Principles and Applications of Powder Diffraction Edited by A. Clearfield, J. Reibenspies and N. Bhuvanesh Wiley, 2008 ...
Dear all, I am facing problem in evaluating my zeolite material My synthesized zeolite tends to have the same d values as that of the standard but the...
the problem of intensity may relate to the minute misalignment of the source tube in your XRD machine. just check it up for standard Quartz sample, how much...
First, I am assuming that preferred orientation is not an issue. Most zeolites are quite sensitive to the amount of bound water which can vary significantly...
Omotoso, Oladipo
oomotoso@...
Sep 22, 2008 2:42 pm
2242
Dipo I completely agree with your assessment. Pradeep we also presume you are not trying to synthesize these zeolites with any new element (isomorphous...
Hi all I have a question that may be is very elementary. I saw some graphs in articles that is about phase determination by synchrotron rediation. in vertical...
hi Reza [a.u.] means arbitrary units. It is conventional to use this when the measurement is not direct (like counts/s) but relative, which is often the case...
Carlo Segre
segre@...
Sep 30, 2008 1:58 pm
2245
Arbitrary Units. One usually measures counts in a detector, but because the x-ray beam intensity from a synchrotron source generally varies in time, one ...
pstephens@...
Sep 30, 2008 2:05 pm
2246
Very basic question 1) How can instrumental broadning be determined. what we have been taught is take a full scan of silicon standard from 25 to 130 degrees...
Hi, ... Recurrent question... You could find many anwers at the Rietveld mailing list archive : http://pcb4122.univ-lemans.fr/forum/rietveld_l/index.html ...
hi reza..ya it is elementry quetion..it means arbitray unit (a.u.) kuldeep phd student Met & Mat Engg. indiain institute of technology Roorkee india ... From:...
Dear all, I tried to refine a spectra that teorically should be cubic, but whem I started the refinement just one peak (111) is missing on teorical fitting,...
What is the space group? best Radovan ... -- Radovan Cerny Laboratoire de Cristallographie 24, quai Ernest-Ansermet CH-1211 Geneva 4, Switzerland Phone :...
I'll try to be more clear. The space group is Pm-3m. When I start to refine with this space group all peaks but one in teorical difractogram comes out. The...
And what is the tetragonal space group which gives good intensity? Radovan ... -- Radovan Cerny Laboratoire de Cristallographie 24, quai Ernest-Ansermet ...
Hi, Higor: i hope i have understood your situation... i came across the similar problem. Fortunately, Prof. Gottschalk told me the right way. Please see the...
Lujun@EKM
jun.lu@...
Oct 22, 2008 10:37 am
2255
The problem you had was the wrong choice of the origin with respect to the numerical values of the atomic coordinates you had. That's a typical error in the...
I think that your problem is in oxygen position. It should be 1/2 1/2 0. Another typical error. Measure two times before you cut (a Czech proverb ) ... Best...
After a simple try, i think it's resonable. Before, O(0.5, 0, 0) was strange and i could not construct proper Ti-O octahedrons. a short suggestion to the...
Lujun@EKM
jun.lu@...
Oct 22, 2008 1:01 pm
2260
hi to all can anyone suggest how the density measurements can be done of the powder samples... as...
Hi, For density measurements of powders you can use a glass pycnometer, or a helium pycnometer (more accurate). I am also interested in the density values of 2...
Hi all I have a very basic question. If suppose the positions of the atoms in the unit cell is given like Mn 16d (5/8,5/8,5/8); Li 8a(0,0,0); O 32e(x,x,x), Is...
Hi, ... That is written in the international tables for crystallography. Alternatively, the Bilbao crystallographic server lists Wyckoff positions and their...
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