Dear colleagues,
enclosed is your feedback to the Rietveld-list survey on powder
diffraction software usage/preferences, which was conducted Nov 2003.
Your replies were very helpful, as we are working on a detailed scope of
diffraction software to be developed under the proposed DANSE project.
We
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Let me put a more particular question on the size estimation from
Rietveld refinement.
If we refined the size-broadening parameters P and X of the
Thompson-Cox-Hastings function (as they are defined in J. Appl. Cryst.
(2004) 911) and corrected them for the instrumental contribution, then
can we say
I'd have to disagree on this point - troublemaker I suppose! I've
followed the work by Langford and Louer closely, and have successfully
applied their techniques
I do not understand on what point exactly you disagree.
The cited paper about size effect in nickel hydroxyde
is co-authored by D. Lo
Title: RE: rietveld refinement
>There was a strong size anisotropy. The X-ray study cannot
>gives the shape (you see that I agree with you on that point),
>an electron microscopy study showed that the coherently
>diffracting domains are plate-like crystallites aggregated along
>the c axis.
An alternative, a diversification, does not mean automatically a
disidence. Let
us not blurred a word very dear to people like me, rising and living most of
the life in a dictatorial regime.
Nowadays, the dissidence against communism is less
distributed in the world.
The new dissidence is against
Small error, sorry,
three of the possible arrangement were :
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Hahn Meitner Institute, Berlin
Department of Magnetism
Scientist Ph.D.
(Physicist, Chemist)
No. SF 2004/16
The Hahn-Meitner-Institut invites applications for a postdoctoral position
in the area of neutron powder diffraction. The successful candidate will be
the responsible scientist for the high
What we see in diffraction is the column lengths (volume & area
averaged) and the classics were not full ignoring the shape and radius
(radii) distribution(s).
Nicolae Popa (Mister, Messieur, Don, Dom, etc.)
Of course I agree with you that completely different shapes
may correspond to the same dis
-
>>Why "dissident" Armel ?
>I am an adept of the open access to the knowledge,
>your religion looks different.
>Armel
>from http://www.dictionary.com:
>Disagreeing, as in opinion or belief.
>\Dis"si*dent\, a. [L. dissidens, -entis, p. pr. of dissidere to sit apart,
>to disagree; dis- + s
>For me "no other choice" is an intolerable constraint.
"The very existence of others may be seen as an intolerable constraint on the
freedom of the individual."
From "Liberty, Equality, Fraternity" by Jean-Marie Cardinal Lustiger writing
on liberty and license.
Just as I thought, it is a que
>
> >The diffraction alone can not decide. Significantly different "physical"
> >size distributions could describe equally well the peak profile
> >(J.Appl.Cryst. v35 (2002) 338-346 - self citation too).
> >Nicolae Popa
>
> Looking at your figures 6b1 and 6b2, I measure how we
> differ on the sens
>I have no other choice but to use ICSD if I pretend to be
>an expert/wizard (=adept ??) in inorganic chemistry.
Armel, that is the nicest compliment I have ever heard about ICSD.
Sincerely, Thanks ! Alan xxx
See how we are different.
For you this is a compliment.
For me "no other choice" is an in
>I have no other choice but to use ICSD if I pretend to be
>an expert/wizard (=adept ??) in inorganic chemistry.
Armel, that is the nicest compliment I have ever heard about ICSD.
Sincerely, Thanks ! Alan xxx
Alan Hewat, ILL Grenoble, FRANCE <[EMAIL PROTECTED]> fax (33) 4.76.20.76.48
(33) 4.7
I am happy to see that you are still a member of the
Rietveld list and still use ICSD,
I have no other choice but to use ICSD if I pretend to be
an expert/wizard (=adept ??) in inorganic chemistry. The
only word defining ICSD is : monopoly. The definitions
below are explicite and adequate, so that
>I am an adept of the open access to the knowledge, your religion looks
>different.
Ahh, so it is a question of Religion. (I should have known :-) Clearly a common
title like "Sir" will not do. How about "Reverend", "Pontiff", "Grand
Ayatollah"...
Adept: [n] someone who is dazzlingly skille
Why "dissident" Armel ?
I am an adept of the open access to the knowledge,
your religion looks different.
Armel
from http://www.dictionary.com:
Disagreeing, as in opinion or belief.
\Dis"si*dent\, a. [L. dissidens, -entis, p. pr. of dissidere to sit apart,
to disagree; dis- + sedere to sit: cf. F
The diffraction alone can not decide. Significantly different "physical"
size distributions could describe equally well the peak profile
(J.Appl.Cryst. v35 (2002) 338-346 - self citation too).
Nicolae Popa
Looking at your figures 6b1 and 6b2, I measure how we
differ on the sense of "significantly
Hi,
I am using FULLPROF program code for Rietveld refinement of XRD data.
I don't know how to obtain values of bond angles and bond lengths by refinements, or some reliable freeware available to calculate. Please suggest.
Krushna
>>Seriously Thanks guys I did not know about this site till I retired and
>>have wished I knew a lot earlier.
>Try also the dissident SDPD Mailing List :
Why "dissident" Armel ? I am happy to see that you are still a member of the
Rietveld list and still use ICSD, but if your are trying for an
> methodology, if not that they are "physical" (I believe they are
> "physical" in case of size-only effect).
The diffraction alone can not decide. Significantly different "physical"
size distributions could describe equally well the peak profile
(J.Appl.Cryst. v35 (2002) 338-346 - self citation
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