In X-ray diffraction (XRD) analysis, K-alpha radiation (Ka) consists of two spectral lines, Ka1 and Ka2, caused by the transition of an electron from the 2p level to the 1s level in the atom. The Ka2 line has slightly lower energy and, thus, a slightly higher wavelength than the Ka1 line.

The presence of these two lines may introduce what is commonly referred to as 'peak splitting' in the XRD patterns, which can complicate the interpretation of the data, particularly in the case of materials with complex diffraction patterns or where peaks are closely spaced.

"Stripping" or removing the Ka2 line (often termed "K-alpha2 stripping") in the data processing step is performed to eliminate the lower intensity and slightly shifted peak that arises from the Ka2 radiation. This can help to simplify the diffraction pattern and make it easier to identify and quantify the phases present.

However, whether this step is "necessary" or not can depend on a variety of factors:

• For simple phase identification, it may not be strictly necessary to remove the Ka2 line. The presence of the Ka2 line does not change the positions of the peaks corresponding to the Ka1 line, which are usually used for phase identification.
• For more complex analysis, such as precise lattice parameter determination, quantification of phase proportions, or determination of crystallite size or strain from peak broadening, removing the Ka2 line can be beneficial.

So, if your analysis is straightforward, and you are not facing problems interpreting your data due to the presence of Ka2, you might not need to do the Ka2 stripping. However, it is typically recommended for more complex analysis or more accurate results.

Hi,

Are you demonstrating the size and distance between crystals?

This provides an explanation for the analysis of the crystalline structure. I'll assist you with computations if you have the information.