At 16:08 27.09.99 +0200, Luca Lutterotti wrote:
>If the anisotropic broadening is due to crystallite and/or microstrain
>and/or planar faulting there are Rietveld programs that allows anisotropic
>broadening. The first work on that was again due to Armel Le Bail (anything
>seem to go around him) (
I'd dealt with the problem of anisotropic broadening in my dissertation
problem and with attempting to work with the data, using the Rietveld
method. I was using a Scintag system to obtain the data for my
dissertation, too, by the way - great instrument, wonderful resolution.
GSAS has provisions
Frank wrote,
>..
>Now the big question? What do I do with data with this good
>resolution? I know there are differences, but is there software to do
>something with it? For instance, I have a pattern with clearly
>resolved, indexed peaks from about 13-33 degrees 2-theta which have
>varying
I thought I'd start a new thread, because the subject has diverged
(h) from the original.
If there are 5000 conventional, fixed-wavelength powder XRD systems in
the world, they must have been manufactured within about the last 4-5
years. In 1995 I attended a workshop at Denver X-ray Conf
>I had the impression that neutron diffraction requires a large amount of
>sample. Isn't this a limitation is some cases ?
This is true to a certain extent, although it depends on the complexity of
the structure and on the elemental content. To get reasonable statistics at
very high resolution,
> ... not at all for magnetism, ...
Ahem, magnetism - resolution is very useful, in certain (rare) cases. I
guess that magnetic structures are not Armel's primary interest
but in at least one case resolution was essential. (FeAsO4 from IRIS (TOF
neutron) dataset, J.Phys:Condens.Matter 11 (1999) 1
