THEORETICAL-STUDY ON COMPLEX F-F TRANSITION SIMULATION OF LUMINESCENCE SPECTRA OF NANOCRYSTALLINE X-1-Y2SIO5-EU3+

Based on the electrostatic crystal-field model of M. Faucher, in which the induced electric dipoles of ligands are obtained from a set of se lf-consistent combined equations and the contributions from far ligand s are considered, the crystal-field energy parameters of nanocrystalli ne X-1-Y2SiO5:Eu3+ at two sites both with C-1 symmetry are calculated by using related data of its crystal structure and physical properties , Moreover, we successfully extend the above model to calculate the tr ansition intensities, therefore giving a computed simulation of lumine scence spectroscopy consistent with the experimental one which we meas ured before, supporting the model and the data we adopted here. (C) 19 98 Published by Elsevier Science S.A.