PXRD: Why when using high res Ge(220)x2 gives strange peak shape compared to using a med res PB-PSA for powders or thin films?

When measuring PXRD for a thin film or powder sample I get strange peak shapes when using a Ge(220)x2 monochromator compared to using a soller slit. I am using a Rigaku Smartlab PXRD, measuring in...

11 November 2020 2,555 3 View