E. Wong, O. Stafsudd, D. R. Johnston
Aug 1, 1963
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Journal
Journal of Chemical Physics
Abstract
The absorption and fluorescence spectra of praseodymium‐doped lanthanum trifluoride, lanthanum ethylsulfate, and yttrium aluminum garnet single crystals are reported. The center of gravity of each J level is shifted to the red when the nearest neighbors of the praseodymium ion change in the order of fluorine, water, chlorine, bromine, and oxygen. This corresponds to an increase of covalent character by 0.7, 0.9, 1.1, and 2.0% for Pr–H2O, Pr–Cl, Pr–Br, and Pr–O bonds when compared with Pr–F.