Dear Dave,
Again, without data it is difficult to say what is right or wrong…
I see that you did not refine the LY parameters responsible for strain
broadening. It means that you neglect the microstrain effect which is hardly
reasonable especially for ball-milled samples.
Regards,
Leonid
*******************************************************
Leonid A. Solovyov
Institute of Chemistry and Chemical Technology
660049, K. Marx 42, Krasnoyarsk, Russia
www.icct.ru/eng/content/persons/Sol_LA
sites.google.com/site/solovyovleonid
*******************************************************
--- On Wed, 11/11/09, David Weston <david.wes...@nottingham.ac.uk> wrote:
> From: David Weston <david.wes...@nottingham.ac.uk>
> Subject:
> To: Rietveld_l@ill.fr
> Date: Wednesday, November 11, 2009, 3:50 PM
> Dear All,
>
> I have taken the LaB6 instrumental data supplied by Leonid
> Solovyov
> (Many thanks!) and I have used it for a heavily milled MgH2
> powder. The
> MgH2 is contaminated with stainless steel from the milling
> pot/balls and
> a bit of oxide. I have allowed the LX parameter to
> vary. The results
> are attached. I would be grateful if
> someone would supply any
> constructive comments please. (Have I got this
> right?)
> The MgH2 pattern is as measured. i.e. no stripping of
> Kalpha2, and it
> has not been smoothed (which a previous version was!)
>
> I am told we do have Soller slits on the machine and will
> look into how
> effective they are at the moment.
>
> I would like to say how very much I appreciate the help
> which has been
> vital to me getting moving with this technique.
>
> Best Regards
>
> Dave Weston
> Research Fellow
> Department of M3
> Wolfson Building
> University of Nottingham
>
