Hi,can u please explain how it works and is there any special phenomenon behind using this holders

In our laboratory we use silicon plates named "Zero Diffraction Plates". They are named so because they give extremely low diffraction signals in an XRD instrument (reflection mode). But how are these plates made to ensure such low signals?

I heard they are cut at a specific atomic layer in the crystal; this layer then becomes the surface. Do diffraction on this layer lead to destructive interference at all possible irradiation angles? I would like to at least have a phenomenological understanding of how this works, and I hope someone is able to help.

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