Dear all,

I did Rietveld refinement of XRD data with fullprof and now I would like to present the results with the corresponding error. There is somthing about the standard deviation of the refined parameters in the fullprof manual (page 43, equation 3.7), but I still don't know,  where I can find the matrix parameters of the equation (pereaps in the output file?). 

Another question is, what is the difference between chi2 and "global user-weighted chi2"? And what causes chi2 to be less than 1? (see attached)

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