Xray diffraction and interplanar spacings
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Bragg's law allows us to calculate interplanar spacings that satisfy the constructive interference condition. Therefore, these are peaks we will see in XRD or X-ray diffraction when we scan samples and monitor intensity as a function of two theta diffraction angle. We need to relate these peaks to specific hkl planes and we can do this using Bragg's law in conjunction with a calculation of interplanar spacing based on the crystal structure and known h k l miller 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