Re: Inel

L. Cranswick ( L.M.D.Cranswick@dl.ac.uk )
Tue, 24 Mar 1998 09:27:42 +0000 (GMT)

I am definitely biased here but you could try the
fundamental parameters based Koalariet. This is
available from the CSIRO site in Melbourne which has macros
that can supposedly handle PSD data. Have not used INEL data
in anger yet but can vouch for the stability of the fundamental
parameters approach to Rietveld.
ftp://ftp.minerals.csiro.au/pub/xtallography/koalariet/
or an alternative via:
http://www.dl.ac.uk/CCP/CCP14/tutorial/xfit-95/getxfit.htm

Also, as with a few other Rietveld programs I believe, you
can link parameters together in an arbitrary manner - such
as Unit-Cell to Occupancy - vegrards law.

I can try to put together an INEL PSD demo for Koalariet if
anyone is interested. At least put this on the list of things
to do.

Lachlan.

>
> I'm using an INEL CPS-120 (Curved position sensitive-120=B0 2Theta) to wa=
> tch
> the development of lattice parameter with time. Unfortunately, I'm not
> getting Rietveld parameters to show the trend I expect.
>
> Does anyone know of either a rietveld program or an analytical function
> that creates the defocusing seen in a 2Theta machine?
>
> thanks,
>
> Charles Witham
>
> Graduate Research Assistant, Materials Science
> California Institute of Technology
> Mail Stop 138-78 ckw@hyperfine.caltech.edu
> Pasadena, CA 91125 (626) 395-3627
> fax -2940
>
>

-- Lachlan M. D. CranswickCollaborative Computational Project No 14 (CCP14)    for Single Crystal and Powder DiffractionDaresbury Laboratory, Warrington, WA4 4AD U.KTel: +44-1925-603703  Fax: +44-1925-603173  Room C14E-mail: l.cranswick@dl.ac.ukCCP14 Webpage (Under heavy reconstruction):   http://www.dl.ac.uk/CCP/CCP14/

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