The first well-resolved, high-resolution d-f emission spectra are reported
for a lanthanide ion. Numerous transitions are observed and assigned for Pr
3+ at a crystal site of octahedral symmetry. The symmetry representation of
the lowest f(1)d(1) state is deduced and the eigenvectors from the 4f(1)5d
(1) energy level fit are utilized to model the experimentally observed inte
nsities. (C) 2001 Elsevier Science B.V. All rights reserved.