CCP14
Methods, Problems and Solutions
GSAS (General Structure Analysis System) Rietveld powder diffraction and Single Crystal software
GSAS - R(F**2) and R Bragg
The CCP14 Homepage is at http://www.ccp14.ac.uk
[The reference to use for GSAS in any resulting publications is:
A.C. Larson and R.B. Von Dreele, "General Structure Analysis System
(GSAS)", Los Alamos National Laboratory Report LAUR 86-748 (1994).]
GSAS - R(F**2) and R Bragg
Relating R(F**2) to DBW style R Bragg
Date: Wed, 07 Feb 2001 09:45:38 -0700
To: "L. Cranswick" [lzc@dl.ac.uk]
From: vondreele@lanl.gov (Bob Von Dreele)
Subject: Re: R(F**2)
>How does R(F**2) relate to the DBW
>style R Bragg? Is the R(F**2) doubled -
>or the square?
Doubled (roughly).
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R(F**2) value not appearing
Date: Wed, 07 Feb 2001 09:45:38 -0700
To: "L. Cranswick" [lzc@dl.ac.uk]
From: vondreele@lanl.gov (Bob Von Dreele)
Subject: Re: R(F**2)
>If you turn off the XRD pattern - and just
>refine on the neutron; the R(F**2) value
>is not outputted in the Genles screen output
>or the list file.
Probably that is because the Fo extraction flag was turned off for that
histogram. Set it back on and RF**2 will appear.
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