Abstract
The X-ray absorption spectra of the transition metal L3,2-edges of the dichalcogenides FeS2 (pyrite), FeSe2, FeTe2, CoS2, CoSe2, CoTe2, NiS2, NiSe2 and NiTe2 have been studied. These spectra are compared with theoretical simulations make using the atomic multiplet approach assuming on octahedral site for the metal atoms. The Ni spectra can be closely simulated using this approach but the Fe and Co spectra show less good fits to the experimental data. The reasons for this and its implications for the use of L-edge spectra in the study of such minerals are discussed in terms of the covalency and the ground states of the compounds; these results indicate the mixing of the ground states increases in the order Ni<Co<Fe.
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Charnock, J.M., Henderson, C.M.B., Mosselmans, J.F.W. et al. 3d transition metal L-edge X-ray absorption studies of the dichalcogenides of Fe, Co and Ni. Phys Chem Minerals 23, 403–408 (1996). https://doi.org/10.1007/BF00202026
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DOI: https://doi.org/10.1007/BF00202026