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cbems 164 xrd sem microanalysis lecture 23 37 powder

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Unformatted text preview: on Pattern! ! ! ! ! !! ! ! ! Structure Factors and Influences on Diffraction Patterns! Does not affect the directions of the diffracted beams, but may influence intensities.! ! ! ! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 23 ! 37 Powder Diffraction Comparison of Two FCC Metals! ! ! ! ! !! ! ! ! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 23 ! 38 The Origin of Selection Rules – The Structure Factor! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 23 ! 39 Reflection Rules! Not all peaks will appear in a diffraction pattern, even if scattering from a set of planes can produce constructive interference. This is due to cancellation due to constructive interference from another set of planes, one-half wavelength out of phase.! ! ! ! !! ! ! ! CBEMS 164 – XRD, SEM & Microanalysis: Lecture 23 ! 40...
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This note was uploaded on 01/16/2014 for the course CBEMS 164 taught by Professor Porter,j during the Fall '08 term at UC Irvine.

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