The3 A 2g →3 T 1g(F) transition in the spectrum of some oxygen-ligated octahedral nickel(II) species

Summary In sodium phosphate glasses, nickel(II) is octahedrally coordinated by the oxygens of the phosphates with ₀ = 7600 cm^–1 and B = 920 cm^–1. Contrary to the case of many other oxygen-coordinated systems including Ni(H₂O)₆]²⁺ and low alkali borate glasses, the second spin-allowed transition to³ T _1g(F) appears as a single-peaked band well-separated from the spinforbidden transition to¹ E _g(D). Variation of the glass composition does not change the main features of the spectrum. Dissolving the glasses in water results in a shift of all the bands to higher energies with the second spin-allowed band becoming triple-peaked. This supports Liehr and Ballhausen's explanation of the structure of this band.Part of a thesis submitted by T. Genena in partial fulfillment of the M.Sc. degree in Solid State Science, 1985.