Hi,

Raw PXRD data usually has asymmetric peaks.

When carrying out PXRD using a Cu source you try to have a monochromatic radiation (of one wavelength). But Cu produces Kbeta and Kalpha radiation. Kbeta is removed using a Ni filter, allowing only Kalpha. But Kalphla can be split into two Kalphla-1 and Kalphla-2. Kalphla-1 is the primary peak we work with, with Kalphla-2 appearing slight to the right of Kalphla-1 and with 1/2 of the intensity. This makes it so you have two different FWMH right and left, depending on resolution.

Depending on your data processing you may not have stripped the Kalpha-2 lines from the collected pattern. There is a option to do this in Highscore.

I hope this helps,

Pól

@Pól MacFhionnghaile

Thank you for your unique answer. I appreciate it.