The recently reported (4)G(7/2) --> I-4(9/2) and F-4(3/2) --> I-4(9/2)
luminescence spectra of U3+ in single crystals of Cs2NaYCl6 are reass
igned. Vibrational wavenumbers of the UCl63- moiety, and the I-4(9/2)
term manifold crystal field splittings are derived.