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Introduction to X-ray Diffraction

0:00 how did scientists originally determine crystal structure? 2:11 discovery of X-rays by Wilhelm Rontgen 3:51 double slit experiment for constructive and destructive interference 9:02 William Bragg discovers X-ray diffraction 10:24 illustration of planes of atoms and their interplanar spacing. 14:58 constructive vs destructive interference 16:23 Constructive interference as a tool for measuring interplanar spacing 20:13 Bragg's Law 21:23 calculating interplanar spacing, d 24:22 example of calculating interplanar spacing 30:51 why certain (hkl) peaks cause XRD reflections but others do not even though they satisfy Bragg's law 33:56 example of calculating allowed/disallowed (hkl) reflections and determining their 2 theta position 49:01 Measuring X-ray diffraction and using XRD patterns to identify crystal structure using matching software