Chemical Effect on X-Ray Absorption-Edge Fine Structure
Existing theories of X-ray absorption-edge fine structure do not adequately explain details of spectra observed for solids. However, the possibility that X-ray absorption spectra might eventually be used as tools for the characterization of new insulator materials has prompted the study of an extensive selection of simple oxides of known chemistry and structure. The complete K absorption fine structure has been measured for some forty simple oxides of six elements of the fourth period. The L absorption-edge spectra have been measured for metallic lead and several lead oxides. The several isostructural and polymorphic sets included among these oxides, as well as the Magnéli phases for three of the elements, have made it possible to study the effects of valence, coordination number, electron configuration, and crystal structure. The applicability of current theories of the fine structures are discussed in the light of these findings. An automated single-crystal spectrometer is described.
KeywordsSimple Oxide Absorption Structure Polyhedral Linkage Isostructural Series Crystal Chemical Parameter
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- 1.L. V. Azâroff, Theory of Extended Fine Structure of X-Ray Absorption EdgesRev. Mod. Phys. 35(4): 1012, 1963.Google Scholar
- 3.T. C. Fumas, Jr., and E. W. White, “New Instruments for X-Ray Analysis,” in: W. M. Mueller (ed.), Advances in X-Ray Analysis,Vol. 4, Plenum Press, New York, 1961, pp. 521537.Google Scholar
- 4.J. B. Goodenough, “Direct Cation—Cation Interaction in Several Oxides,”Phys. Rev. 117: 1442 1451, 1960.Google Scholar
- 5.A. I. Kozlenkov,Theory of the Fine Structure of X-Ray Absorption SpectraBull. Acad. Sci. USSR Phys. Ser. (English Transi.) 25 (8): 968–987, 1961.Google Scholar
- 6.F. W. Lytle, “X–Ray Absorption Fine Structure in Crystalline and Noncrystalline Materials,” presented at the International Conference on Physics of Non–Crystalline Solids, Delft, Netherlands; Boeing Scientific Research Laboratories Report D1–82–0361, Seattle, Washington, 1964.Google Scholar
- 7.W. F. Nelson, I. Siegel, and R. W. Wagner, “K X-Ray Absorption Spectra of Germanium in Crystalline and in Amorphous Ge02, ” Phys. Rev. 127: 2025, 1962.Google Scholar
- 10.D. W. Strickler, “The 1: 5 and Defect Spinels in the System LisO • Fe203 • Al2O3,” M.S. Thesis, The Pennsylvania State University, University Park, Pennsylvania, 1959.Google Scholar
- 11.R. A. Van Nordstrand, “X-Ray Absorption Edge Spectroscopy of Compounds of Chromium, Manganese, and Cobalt in Crystalline and Non-Crystalline Systems,” in: V. D. Frechette (ed.), Non-Crystalline Solids, John Wiley & Sons, New York, 1960, pp. 168–198.Google Scholar
- 12.E. W. White, “Chemical Characterization of Materials by X-Ray Spectroscopy,” Ph.D. Thesis, The Pennsylvania State University, University Park, Pennsylvania, 1965.Google Scholar