This paper describes an investigation by ESR methods of the bonding of ironhyphen;group impurity ions with the configurationsd3,d5, andd8in LiF, NaF, KF, KMgF3, and KCdF3. The results indicate that pgr; and sgr; bonding are comparable in magnitude and provide evidence for the relaxation of ligands on to impurity ions in the alkali halides.
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