ELECTRONIC ABSORPTION SPECTRUM OF NICKEL(2) IN CUBIC PEROVSKITE FLUORIDES .3. ULTRAVIOLET SPECTRUM

The ultraviolet absorption spectrum of divalent nickel is shown to be dependent on concentration for crystals of composition KMgxNil-xF3 with 0 < x < 1. The eight ultraviolet absorption bands have intensities which are directly related to the number of nearest neighbour nickel ions per nickel ion. Three of the bands can be assigned to states of the1G and1S terms while the remaining five have energies which can be equated to combinations of the energies of the excited singlet stateslEgaITa2g and1Aag and are simultaneous electronic excitations. © 1968 CSIRO. All rights reserved.