An analysis of the optical spectra of single crystals of Cs2NaPrCl6

Abstract
The optical spectra of single crystals of Cs2NaPrCl6 are reported. A complete f2 analysis gives the parameters: F2=302.0 cm−1, F4/F2=0.1600, F6/F2=0.01596, ξ4f=754.8 cm−1, α=19. cm−1, A4r4〉=288.6 cm−1 and A6r6〉=39.6 cm−1. A comparison of these parameters with those of the free Pr+3 ion indicates a covalency of 3%. The magnetic susceptibility is calculated and compared to that measured previously.