Why was my message rejected ?

2008-06-12 Thread Alan Hewat
If you receive an email that your message to the Rietveld list was rejected, it is NOT because some-one out there doesn't like you :-) Messages are not even seen by a real person before they are circulated. simply rejects any message that does not originate from a registered email address. That he

Re: PDF refinement pros and cons

2008-06-12 Thread Jonathan Wright
Hi Alan, I also find it hard to understand the rationale behind this approach. G(r) can suffer from fourier truncation artifacts due to the finite q range of the data, but there seems to be no such limitation in a model. Isn't there a risk of fitting to truncation ripples with G(r)? As for c

Bruker LynxEye detector

2008-06-12 Thread Matthew Beekman
Hello all, I would like to know if anyone has any experience with using the Bruker LynxEye detector. Specifically, I am interested to learn about profile shapes typically produced with this detector, etc., and suitability for Rietveld refinement. Any info or opinions are much appreciated! Best wi

PDF refinement pros and cons

2008-06-12 Thread AlanCoelho
HI all Looking at the Pair Distribution Function and refinement I come away with the following: Fitting in real space (directly to G(r)) should be equivalent to fitting to reciprocal space except for a difference in the cost function. Is this difference beneficial in any way. In other words