Derechos:Copyright (2005) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article prepared in (Ruipérez, F., Seijo, L. and Z. Barandiarán. "Prediction of pressure-induced redshift of f1--d(t2g)1 excitations in Cs2NaYCl6:Ce3+ and its connection with bond-length shortening." Journal of Chemical Physics 122.23 (2005): 234507) and may be found at http://jcp.aip.org/resource/1/jcpsa6/v122/i23/p234507_s1