lattice parameter determination

2008-05-08 Thread Matthew Beekman
Dear all, I would like to hear opinions on the best method for the most accurate determination of unit cell parameters from powder data. The literature shows several techniques are used in general, e.g., Least squares refinement of peak positions with (or without) an internal standard, Rietveld r

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

Re: background subtraction R values

2009-03-07 Thread Matthew Beekman
Hello all, A quick question regarding the background subtracted R values: In the .LST file, GSAS gives two sets of values for wRp and Rp: "Fitted" and "- Bknd." I understood the Fitted values to be calculated including the background, and the -Bknd to be calculated with the background removed fr