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When an electron beam travels through a crystal structure the electrons are deflected based on the crystal’s assembly and orientation. This is known as electron diffraction (ED). Crystals consist of repeated homogeneous atomic orientation so many electrons from the beam will diffract in a similar manner. When a detector (i.e.; a screen) is placed behind the sample, these diffracted electrons form distinct patterns. These electron diffraction patterns provide information on the crystals and can be compared to known ED patterns for various crystals to investigate sample constitution, consistency and purity.
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