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 refine U and Y, if it doesn't work try several values of Y and refine U.
Moreover check that you don't have anisotropic broadening.
Best regards,
Patrick WEISBECKER.
Laboratoire de Science et Genie des Materiaux metalliques.
Ecole des Mines de Nancy
>
> 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
>
> eta = eta0 + X * 2theta
>
> I hope this help you !
>
> Best regards,
>
> Claudio.
>
