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Experiment 1: Crystal Structure: X - Ray Diffraction
The X-Ray diffraction technique is used to determine the crystal structure and interatomic spacing of crystallinesamples through constructive interference of reflected x-ray beams.
Bragg's Law and X-Ray diffraction data, in combination with the expressions for interatomic spacing in terms of the lattice parameter and Miller indices for acrystal, can be utilized to identify crystal structures, determine lattice constants, and locate defects within astructure.
X-Ray diffraction data has been collected for a FCC brass sample and a BCC steel sample; the data will be analyzed to determine the lattice parameter and preferred orientations for these materials.
Return back to experimental course: Materials of Engineering Laboratory
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x-ray microdiffraction investigations
Application of the X-ray microdiffraction investigations
Arief Budiman and coworkers have observed no characteristic Laue reflection broadening (associated with dislocation structure) from x-ray microdiffraction investigations of sub-micron scale compression experiments in Au.
x-ray fluorescence
X-ray crystallography has become the primary methodology used to
determine the 3D structure of macromolecules. However, biological
specimens such as cells, organelles, viruses and many important
macromolecules are difficult or impossible to crystallize, and hence
their structures are not accessible by crystallography..........
x-ray fluorescence