X-ray investigation of crystal structures / Laue method

Article no. P2541605 | Type: Experiments

grades 10-13, University
30 Minutes
heavy
Students

Principle

Laue diagrams are produced when monocrystals are irradiated with polychromatic X-rays. This method is primarily used for the determination of crystal symmetries and the orientation of crystals. When a LiF monocrystal is irradiated with polychromatic X-rays, a characteristic diffraction pattern results. This pattern is photographed and then evaluated.

Tasks

  1. The Laue diffraction of an LiF mono-crystal is to be recorded on a film.
  2. The Miller indices of the corresponding crystal surfaces are to be assigned to the Laue reflections.


Learning objectives

  • Crystal lattices
  • Crystal systems
  • Crystal classes
  • Bravais lattice
  • Reciprocal lattice
  • Miller indices
  • Structure amplitude
  • Atomic form factor
  • The Bragg equation
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