3 Crystal Structure Analysis Crystal Structure Analysis Xray diffraction 2. Single crystal Diffraction 3. Xray Powder Diffraction Electron Diffraction Neutron diffraction Essence of diffraction: Bragg Diffraction Crystals. Powders, and Diffraction X-ray Diffraction X'ray Diffraction-When an X'ray beam pattern.This phenomenon, known as X ra a bombards a crystal, the atomic structure of th crystal causes the beam to scatter in a spe X ravs and, the ds tanees bet weee atoms in the crystal are of similar magnitude Unit Cell Bragg Ang Crystal (Crystallite X-ray Powder Pattern Laue equations crystal? periodic repetition of identical unit Diffraction cells? diffraction grid constructive interference of scattered waves only in particular directions a( COS O-cosa)=hλ1 3 Crystal Structure Analysis 1. Bragg Equation 2. Single Crystal Diffraction 3. X-ray Powder Diffraction Crystal Structure Analysis X-ray diffraction Electron Diffraction Neutron Diffraction Essence of diffraction: Bragg Diffraction Intensity Bragg Angle Unit Cell Crystal (Crystallite) X-ray Powder Pattern Electron Diffraction Powder Pattern Crystals, Powders, and Diffraction 0 Polycrystalline Specimen X-ray Diffraction ¾ When an X-ray beam bombards a crystal, the atomic structure of the crystal causes the beam to scatter in a specific pattern. This phenomenon, known as X-ray diffraction, occurs when the wavelength of the X rays and the distances between atoms in the crystal are of similar magnitude. X-ray Diffraction Laue Equations crystal ? periodic repetition of identical unit cells ? diffraction grid ? constructive interference of scattered waves only in particular directions: von Laue Diffraction a(cosa0 - cos a) = hl