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This paper derives the physical meanings of peak position, peak width and height of an X-ray diffraction peak from the analyses of the Bragg’s equation, the Scherrer’s formula and the principle of peak intensity calculation. The geometric characteristics of an asymmetric peak are clarified by means of experiment. The relationships between peak shape and domain size/lattice strain have been verified by geological events. Therefore this paper integrates the physical meanings of all 5 basic parameters for an X-ray diffraction peak. Applications of these 5 parameters are exemplified.
This paper derives the physical meanings of peak position, peak width and height of an X-ray diffraction peak from the analyzes of the Bragg’s equation, the Scherrer’s formula and the principle of peak intensity calculation. The geometric characteristics of an asymmetric peak are clarified by means of experiment. The relationships between peak shape and domain size / lattice strain have been verified by geological events. Therefore this paper integrates the physical meanings of all 5 basic parameters for an X-ray diffraction peak. Applications of these 5 parameters are under.