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Royal Society of Chemistry, Chemical Communications, 46(49), p. 5259

DOI: 10.1039/c3cc41506f

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Microscopic origin of the optical processes in blue sapphire

Journal article published in 2013 by Jessica K. Bristow, Stephen C. Parker, Cra Richard A. Catlow, C. Richard A. Catlow, C. Richard A. Catlow, Scott M. Woodley ORCID, Aron Walsh ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Al2O3 changes from transparent to a range of intense colours depending on the chemical impurities present. In blue sapphire, Fe and Ti are incorporated; however, the chemical process that gives rise to the colour has long been debated. Atomistic modelling identifies charge transfer from Ti(iii) to Fe(iii) as being responsible for the characteristic blue appearance.