You can also try another peak shape, Thompson-Cox-Hasting pseudo-Voigt
(npr=7) is suited is you have broadening from cristallite size or
microstrain. you refine U,V,W for Gaussian Component and Y,X for Lorentzian
Component. It can be wise not to refine the 5 components simutaneously;
first refi
Dear Edouard,
You can try to refine the X parameter that follows U,V,W (FWHM
parameters) in the input file for FULLPROF. This will give you another degree
of freedom, in the sense that the eta parameter can now increase with 2theta
through the equation
