o...@gmail.com
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several times in the future and answers will be
a great help to many subscribers here.
Sorry for long text.
Best wishes,
Maxim
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mans.fr/cod/pcod/
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about this subject, because we are
about to change our diffractometer in our lab.
I am thinking about several possible standards in reflexion and
transmission geometries...
In reflexion geometry, we have several ideas (open to any suggestion !),
but I still search in transmission.
The objective
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://sites.google.com/site/solovyovleonid
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/1.72 =0.017=1.7% - seems to be good.
Best wishes,
Maxim ++
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The Rietveld_L list archive
Dear Rietveld community;
I would like to fit SAXS data in order to extract grain-size distribution, pore
size distribution, etc.
I would like to hear your oppinion regarding the software suitability for the
refinement of SAXS data under the Windows 7 platform?
Regards,
Igor
Hi,
How can I determine the location of cations such as Ca Mg (a carbonate
mineral) ? Are there any techniques to define their location (even their
surface abundance on crystal structure is sufficient for me ) ?
Pls note that I have this sample in clay material, meanly it is not pure
(Impossible
Laks Lakshminarasimhan has invited you to Jhoos
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Dear all
I need a pdf book of the Rietveld method i dont have money to buy him
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Dear Wenduo
Some pointers: makes sure you have good data and good models to start with. If
you arn't getting low(ish) Rwp factors you arn't getting a reliable
quantitative result. If you collected on flat-plate geometry it is likely you
have some preferred orientation which messes up your
Dear
I would like to ask you for the explanation of the crystallographic notation D23
Thank you
Jana
Jana Bezjak
Jozef Stefan Institute
Jamova 39
SI-1000 Ljubljana, Slovenia
Advanced Materials Department
+386 (0)1 477-35-47
Dear
I am looking for sombody who knows convergent beam electron diffraction (CBED).
I know my compound crystallize within the hexagonal lattice but I do not know
the space group which I have to know if I want to solve the crystal structure.
Please let me know for anybody how could help me
Dear All
I try to describe the crystal structure
of a material from BaO Nb2O5-WO3 system with Rietveld refinement method. I get
abnormal thermal parameters (Beq) for Ba, O and Nb. Has somebody faced a problem
like that and how do I limit the Beq, I mean what are the proper
values?
Thank
Dear all, my question is:
I'm refining neutron powder diffraction data of an oxide containing several
metals. In my model I use the nominal composition; generally speaking, is it
meaningful trying to refine the occupation of an atomic species whose
concentration is few percent?
Note that the
Hello everybody,
I am a graduate student at University of Houston.I
intend to use EXPGUI to model nano clusters embedded
in pours structures. I collected my Anomalous x ray
data sets at edge and off edge energies.
First I need to scale the two data sets properly and
then refine them
Dear all,
I have a problem with the new version of Fullprof. I cannot obtain the
calculation of the bond distances and bond angles; at the end of the
refinement a FILE_1.dis is generated, ending with the sentence PROGRAM_STR
finished in error!, instead of the expected FILE.dis. Note that I
Dear all,
does anybody know a free software for plotting magnetic structures?
Thanks in advance for help.
Alberto
Hi,
there is a software called fp_studio distributed with the recent version
of Fullprof.
Good luck
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Laboratoire de Physico-Chimie des Solides
UMR 8648
Bat.414-Universite Paris XI
91405 ORSAY Cedex -
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Riza Iskandar
Research Center for
Materials Science
University of Indonesia
Dear all,
I've got a problem with the Rietveld refinements of synchrotron data.
I'm using Fullprof and the problem is that the overall B, and then also
some of the isotropic displacement parameters, fall down to negative
values. I'm not very experienced in the treatment of synchrotron data and
Does anybody know where to find RIR values for minerals (database or something)
Thank you.
John
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Hello,
Does anybody know how do you move the thick marks
in the peaks position because though I havea good fit they are all shifted
to the left. Shall I refine ZERO?
Anticipated thanks to any kind of
suggestions.
Doinita
against a single list of reflections. The reflections can be from more
than one phase and the patterns can be subject to refinements where some phases
are done by Rietveld and others by Pawley (not tested). The Pawley set of reflections
can also be subject to a restraint against negative values
Dear all,
I have some questions concerning the refinement of
the gppd data and would appreciate your advice:
1) The patterns show some kind of texture(up and
down on the error curve), but the sample is powder(although maybe the granules
are large) and should be isotropic. All banks show
I'd like to be cancelled from this mailing list. Thank yuo
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I installed GSAS in windows2000 operating system. I added in the path
c:\gsas\exe and also set the variables GSAS and PGPLOT_FONT, however the
program starts to run and then always produces an error: Access violation
at address 0041366F. Read of address 646E6997.
Could someone indicate a
Dear colleagues,
I am using Fullprof for a Rietvield refinement of a inorganic-organic structure.
The organic molecule is a aliphatic diamine (1.12 diamine).
In order to reduce the number of parameters to refine, I would like to try a
refinement with a rigid model.
I am looking for an example
I have noticed a systematic Rwp improvement about 1% in my Rietveld
refinements carried out with data our difractometer, as it is included an
aditional phase (I use Aluminium, but works with other) but with very
broadened peaks (those of crystals about 1 cell in size).
Is this improvement due to
Hi,
Can any one give me suggestion about the fractional(
x,y,z) coordinates, temperature factors etc. of
Clinoptilolite(K2, Na2, Ca)3Al6Si30 O72.2H20
( Zeolite).
Thanks
Mainak Mookherjee
Graduate student in Mineral Sciences
Do You
I have refined a structure at different temperatures (10-300K). The lattice constant increases with increasing temperature. At low temperature (below 50K) the variation is not linear. In some papers , I have read that a simple Debye model is sufficient to fit this behavior. Is is correst? In this
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