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2p X-ray absorption of titanium in minerals |
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| Authors: | F. M. F. de Groot M. O. Figueiredo M. J. Basto M. Abbate H. Petersen J. C. Fuggle |
| Affiliation: | 1. Spectroscopy of Solids and Surfaces, University of Nijmegen, Toernooiveld, 6525, ED Nijmegen, The Netherlands 2. Centro de Cristalografia e Mineralogia, Instituto de Investiga??o Cientifica Tropical, Al. Afonso Henriques 41-4, 1000, Lisboa, Portugal 3. Laboratório de Mineralogia e Petrologia, Instituto Superior Técnico, Av. Rovisco Pais, 1096, Lisboa, Portugal 4. Berliner ElektronenSpeicherring-Gesellschaft, für Synchrotronstrahlung (BESSY), Lentzeallee 100, W-1000, Berlin 33, Germany |
| Abstract: | Ti 2p X-ray absorption spectra for a series of minerals have been measured. Crystal field multiplet calculations can explain the spectral shape. The asymmetry of the eg, peak is shown to be related to distortions of the TiIV octahedron. It is found, theoretically as well as experimentally, that the absorption spectra are more sensitive to tetragonal distortions than to trigonal distortions. A number of silicate minerals and metamict minerals containing titanium are measured and TiIIIhas not been observed in any of these minerals. A comparison is made to the 1s X-ray absorption, and the potential of both for the study of minerals is discussed. |
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