Dear All, I need a crystal structure of Cu3 Si compound, kindly sent the details or any publications (e_papers). I found in JCPDF, it contains the lattice...
Murugesan S
muruges@...
Jun 3, 2009 9:36 am
2386
Hi , I wonder if there is a green vanadium oxide . Thanks Ben Messaoud. F [Non-text portions of this message have been removed]...
Hi, During those "heroic times" (before 1990 ?), many scientists were thinking that SDPD was not a serious job. It was thus sometimes difficult to convince the...
Has anybody done this since then :-) lubo "The author should reexamine more critically the problem, supply more convincing arguments for justifying the choice ...
Lubomir Smrcok
uachsmrk@...
Jun 9, 2009 7:12 am
2389
Hi, Probably you have several such samples in your drawers, samples that are not pure (up to 1-3 impurities or more), indexed (but is it so sure ?), and a...
The content of J. Appl. Cryst. 42, part 4 (August 2009 issue) is available. http://journals.iucr.org/j/issues/2009/04/00/issconts.html The paper about the...
Dear Armel, When I encounter unindexed peaks I, normally, ask the chemists to repeat the synthesis at slightly different conditions. If the unindexed peaks...
Continuing in this series of mortal comments about SDPD manuscripts. A title for this one : 3D is obsolete, use 4D. (well, maybe the reviewer is right, damn !)...
Dear Leonid, ... You may change that opinion when approaching retirement and having interesting dirty things in your drawers ;-). Moreover, dirty structures...
Dear Armel As a young guy, in case that some minor diffractions cannot be fitted with expected structure, i prefer publish or openly document them in a local...
Lujun@EKM
jun.lu@...
Jun 16, 2009 8:04 am
2395
Armel, one thing that occurs to me is to use a theoretical method (preferably DFT) to show that your structure make sense, especially if it is controversial....
Dear Jun Lu, ... OK, but this situation is the consequence of an excess in the requirement that crystallography should now lead exclusively to perfect crystal...
HI All, As a high-pressure researcher, I have published some dirty structures and even some filthy ones. The key is to stay away from crystallographic...
Kurt Leinenweber
KURTL@...
Jun 16, 2009 2:43 pm
2398
Are the COD Advisory Board members prepared to a legal action against them ? This reviewers comment received aftre the COD paper submission is a closing speech...
There is no sense of a big debate about this message, if COD is so poor, why such an agressive manner of telling it ! To scare us ? I got the use of never...
Daniel Chateigner
daniel.chateigner@...
Jun 18, 2009 7:53 am
2400
Dear Colleague, We have the pleasure ton inform you that we organize with the collaboration of Humboldt Kolleg '09 an international conference on "Advancements...
People are strange… Why on earth they continue drinking free fresh water while there are 100% reliable, certified, perfectly copyrighted, protected by an...
Dear Colleagues, I am advertising one postdoctoral position dealing with the characterization of the 'structural behavior of porous MOF as a function of...
Can You pl send me the URL or web address/name to get .cif file for the compound Bi4V1.8Cu0.2O11? Yahoo! recommends that you upgrade to the new and safer...
dear sir if the sufficient knowledge about the structure is known(eg. lattice parameters, space group, approximate atomic positions etc), then what must be the...
Hi, I would say that if you know the space group, cell parameter and approximate atomic position, your structure is already solved. I suppose that what you...
Hello, Unless you have single crystals, the best approach is to use powder diffraction data and to refine the model by using the Rietveld method (FULLPROF,...
hello can i make the conclusion of this discussion as "by knowing the exact lattice parameters and space group of sample, i should first expract the structure...
... This is not necessary for a "model-based structure refinement." Your description gives one of the various possibilities for attempting a SDPD, this is...
in the article "TRENDS IN STRUCTURE DETERMINATION BY POWDER DIFFRACTOMETRY" by Armel Le Bail, the two different statigies of SDPD are given. 1st one is 1....
... Thanks for the citation. ... there are now more possibilities including many direct space methods (locating molecules, etc) by simulated annealing, genetic...
respected Armel Le Bail and other group fellows we make use of direct and patterson methods for structure solution. and most of the structures, uptill...
Hi Muhammed As I understand probably you can try software like JANA2006 that is available for free. Jana deals with structure refinement with charge flipping...
dear all i have prepared the problem statement, which is in the attached file"FERRITE.doc". please see and analyse that whether i m going to adopt the right...
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