Re: Inel

MARTIN VICKERS TEL: 0171 631 6813 ( vickers@gordon.cryst.bbk.ac.uk )
Tue, 24 Mar 1998 11:23:28 +0100

>P.S. Don't forget to let your 2theta zero rietveld constant to vary
>with the unit cell parameters since this is how the height
>sensitivity is expressed in the refinement.

Dear Rory

Careful about confusing 2theta zero offset and hight. They are highly
correlated, but they are not the same. Hight is angular dependent, the other
is not. This will cause problems when one has a wide 2theta range to refine.
Most Rietveld programs can deal with the two independantly but I wouldn't let
them refine at the same time.

Martin

M Vickers
Dept of Crystallography
Birkbeck College
Malet St
London WC1E 7HX