X-ray Diffraction (XRD)






Basic Theory: Diffraction and Bragg's Law

Take a look at the diagram below: 

X-rays Interacting with Material

A. When X-rays interact with a single particle, it scatters the incident beam uniformly in all directions. 

B. When X-rays interact with a solid material the scattered beams can add together in a few directions and reinforce each other to yield diffraction.  The regularity of the material is responsible for the diffraction of the beams.

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Celeste Morris, Bradley Sieve and Heather Bullen, Department of Chemistry, Northern Kentucky University, Highland Heights, KY 41099