What is X-ray crystallography

X-ray crystallography the use of *x-ray diffraction to determine the structure of crystals or molecules. The technique involves directing a beam of x-rays at a crystalline sample and recording the diffracted x-rays on a photographic plate. The diffraction pattern consists of a pattern of spots on the plate, and the crystal structure can be worked out from the positions and intensities of the diffraction spots. X-rays are diffracted by the electrons in the atoms and if crystals of a compound are used, the electron density distribution in the ions or molecules can be determined. See also NEUTRON DIFFRACTION.