As per the underlying concept of this new theory, when X-rays are scattered from tiny crystals or crystallites of any size and shape distributed throughout space, the diffraction pattern will contain enhanced scattering at angles of exactly equal to 2θB, whatever the orientation of the crystal. Thus it is claimed that scattering from a randomly oriented crystal powder with gives rise to Bragg scattering peaks even if the Bragg condition of individual crystallite is not satisfied.
https://journals.iucr.org/a/issues/2014/03/00/sc5066/sc5066.pdf
Do you agree ?
What is your opinion?
See
Acta Cryst. (2018). A74, 447-456
Acta Cryst. (2018). A74, 457-465
@ Dear Aram Petrosyan: Thank you very much for sharing two interesting papers " Comments and back Response" related to this interesting theory.
Dear Aga Shahee
I think the theory annunced buy Fewster’s is based on the misleading of the effect of solid surface structure which controls the basically the structure forms in the nanoscale sizes of crystals and may be appears clearly in the crystalline powder form. I had a quick looking to the article and he denoted to particles less than 10 microns for his hypothesis. In this size surface effetc will be significantly appears on the X-ray diffraction data for the powder form crystalline, for more details on nanosize crystaline state I suggest to see the following power point
"Solid Surface and Nanoscale materials Structure" M. S. Omar Presentation · July 2016 with 156 Reads DOI: 10.13140/RG.2.2.31947.59684 Charmo, University of Charmo, University of Salahaddin, DOI:10.13140/RG.2.2.31947.596
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