While performing Rietveld refinement in FullProf (EdPCR), why are my intensities dropping to zero on varying scale?

I'm trying to refine synchrotron XRD data collected on LaB6. I've generated the .dat file by processing it in DAWN and am using it as input for EdPCR (XYDAT, INSTRM=10). For structural and atomic...

01 January 2019 8,463 6 View