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Nonsymmetrical X-ray diffraction in a perfect rectangular t x l crystal. Extinction and absorption.

Thorkildsen1, Larsen

  • 1Department of Mathematics and Natural Science, Stavanger College, Ullandhaug, 4004 Stavanger, Norway. gunnar.thorkildsen@tn.his.no

Acta Crystallographica. Section A, Foundations of Crystallography
|August 6, 2000
PubMed
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This study investigates X-ray diffraction in rectangular crystals under nonsymmetrical scattering. Findings show that scattering geometry significantly impacts diffraction intensity contributions, especially at higher asymmetry values.

Area of Science:

  • Solid-state physics
  • Crystallography
  • X-ray diffraction theory

Background:

  • Diffraction in crystals is fundamental to materials characterization.
  • Understanding scattering phenomena in various crystal geometries is crucial.
  • Nonsymmetrical coplanar scattering introduces complexities in diffraction analysis.

Purpose of the Study:

  • To theoretically investigate X-ray diffraction in rectangular crystals.
  • To analyze the effects of nonsymmetrical coplanar scattering geometry.
  • To determine how asymmetry influences Laue-Bragg contributions and absorption.

Main Methods:

  • Theoretical analysis of diffraction.
  • Investigation of nonsymmetrical coplanar scattering.
  • Examination of mixed Laue-Bragg contributions to integrated power.

Related Experiment Videos

  • Analysis of primary extinction and absorption effects.

    • Main Results:

    • Scattering asymmetry (gamma) alters weights of Laue-Bragg contributions.
    • Primary extinction and absorption are moderately affected for zeta < 1.
    • Increasing zeta and gamma significantly changes surface integration for Laue and Bragg regions.
    • Pronounced effects on diffraction intensity observed with increased asymmetry.

    Conclusions:

    • The geometrical parameter zeta and asymmetry angle gamma critically influence diffraction patterns.
    • Analytical results for the normal absorption factor are derived.
    • This work provides insights into diffraction behavior in specific crystal geometries.