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Next: Identification and raw material evaluation Up: Diffraction Previous: Stress determination in metals

Determination of particle size

The angular spread of the reflection from a crystal plane is affected not only by the perfection of the crystal but also by the size of the crystal. As the average size of the crystallites decreases, so the angular spread of the reflection from a powder will increase. After suitable calibration, the half height width of a reflection in a powder diffractogram can be used as quantitative measure of the mean particle size of the sample.



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