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

Bromiley, G. D. and Shiryaev, A. A. (2006) Neutron irradiation and post-irradiation annealing of rutile (TiO2-x): effect on hydrogen incorporation and optical absorption. Physics and Chemistry of Minerals, 33 (6). pp. 426-434. ISSN 0342-1791 (Print) 1432-2021 (Online) DOI 10.1007/s00269-006-0087-9

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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.

Item Type: Article
Uncontrolled Keywords: 2006 AREP IA51 IA52 2006 P
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Physics and Chemistry of Minerals
Volume: 33
Page Range: pp. 426-434
Identification Number: 10.1007/s00269-006-0087-9
Depositing User: Sarah Humbert
Date Deposited: 16 Feb 2009 13:01
Last Modified: 23 Jul 2013 10:01
URI: http://eprints.esc.cam.ac.uk/id/eprint/162

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