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ESR and Structural Studies on Pseudo-Alexandrite

  • S. Arafa
  • S. Haraldson
  • A. Hassib

Abstract

Structural analysis using x-ray, mass spectroscopy and ESR measurements were made on “Alexandrite” stones obtained from markets in Egypt, Germany and Sweden. The results show that all the samples studied are not synthetic Alexandrite but are synthetic crystals of α-Al2O3 doped with varying concentrations of vanadium, chromium and iron. The crystals show similar optical properties to Alexandrite crystals (the chromium bearing chrysoberyl, BeAl2O4:Cr) and are therefore termed “pseudo-Alexandrite.”

Keywords

Liquid Helium Temperature Hexagonal Close Packing Hamiltonian Spin Synthetic Crystal Strong Crystal Field 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • S. Arafa
    • 1
  • S. Haraldson
    • 2
  • A. Hassib
    • 2
  1. 1.The American University in CairoEgypt
  2. 2.University of UppsalaSweden

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