Physics and Chemistry of Minerals

, Volume 33, Issue 6, pp 426–434

Neutron irradiation and post-irradiation annealing of rutile (TiO2−x): effect on hydrogen incorporation and optical absorption

Original Paper

Abstract

Neutron irradiation and post-irradiation annealing under oxidising and reducing conditions have been used to investigate H incorporation in, and the optical properties of, reduced (TiO2−x) rutile. Optical absorption in rutile is mainly due to a Ti3+ Ti4+ intervalence charge transfer effect. The main mechanism for H incorporation in rutile involves interstitial H not coupled to other defects, which has important implications for the rate of H diffusion, and possibly also on the electrical properties of rutile. Additional minor OH absorption bands in IR spectra indicate that a small amount of interstitial H is coupled to defects such as Ti3+ on the main octahedral site, and indicates that more than one H incorporation mechanism may operate. Concentration of oxygen vacancies has a controlling influence on the H affinity of rutile.

Keywords

Hydrogen Rutile Spectroscopy Neutron irradiation Radiation defects 

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Geoffrey David Bromiley
    • 1
    • 2
  • Andrei A. Shiryaev
    • 3
  1. 1.Bayerisches GeoinstitutUniversität BayreuthBayreuthGermany
  2. 2.Department of Earth SciencesUniversity of CambridgeCambridgeUK
  3. 3.A.V. Shubnikov Institute of Crystallography RASMoscowRussia

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