This paper describes an investigation by ESR methods of the bonding of iron-group impurity ions with the configurations d3, d5, and d8 in LiF, NaF, KF, KMgF3, and KCdF3. The results indicate that π and σ bonding are comparable in magnitude and provide evidence for the relaxation of ligands on to impurity ions in the alkali halides.

No abstract

No abstract

No abstract

This paper describes an ESR investigation of the bonding of iron-group ions with the configurations d6(Fe2+) and d7(Fe+, Co2+, Ni3+) on cubic lattice sites in the crystals LiF, NaF, and KMgF3. To aid the analysis of the bonding of d7 ions, the optical absorption spectrum of Co2+ was measured in LiF and KMgF3. A discussion is given of the effects of lattice dimensions and the charge state of the impurity ion on the bonding parameters.

No abstract

No abstract

No abstract