Electric Field Gradients in Iron Compounds
Since the Mössbauer effect was observed in Fe57 this isotope has been used to study the physical and chemical properties of many iron-containing compounds. The second nonzero term which describes the electrostatic interaction between a nucleus and the surrounding electrons is the nuclear quadrupole interaction. When the local symmetry of the iron atom is less than cubic, this interaction can split or shift the nuclear energy levels. This phenomenon was first observed, via the Mössbauer effect, by Kistner and Sunyar  in the Fe57 Mössbauer spectrum of Fe2O3. Mössbauer spectroscopy has thus made it possible to directly measure the magnitude, and in some cases the sign, of the nuclear quadrupole coupling constants in many iron compounds. This parameter has had several interesting physical and chemical applications, and some systematics in the values have been observed.
KeywordsElectric Field Gradient Iron Compound Quadrupole Coupling Constant Nuclear Quadrupole Interaction Ferrous Compound
Unable to display preview. Download preview PDF.
- 2.A. Abragam, L’Effect Mössbauer et ses Applications à l’Etude des Champs Internes ( Gordon and Breach, New York, 1964 ), p. 28.Google Scholar
- 3.H. Kofpermann, Nuclear Moments ( Academic Press, New York, 1958 ), p. 127.Google Scholar
- 14.A. H. Muir, Jr., K. J. Ando, and H. M. Coogan, Mössbauer Effect Data Index (North American Aviation Science Center, Thousand Oaks, California, 1965 ).Google Scholar
- 15.P. R. Brady, J. F. Duncan, and K. F. Mok, Proc. Roy. Soc. (London) 287: 343 (1965).Google Scholar
- 18.L. G. Lang, S. DeBenedetti, and R. L. Ingalls, J. Phys. Soc. Japan 17 (Suppl. B-1): 131 (1962).Google Scholar
- 22.G. K. Wertheim, Phys. Rev. 121:63 (1961); A. Abragam, op. cit.,p. 60.Google Scholar
- 23.V. I. Gol’danskii, E. F. Makarov, and V. V. Khrapov, Phys. Letters 3: 34 (1963).Google Scholar
- 28.P. H. Remy and H. Pollak, Rev. Mod. Phys. 36:352 (1964); H. Pollak and P. H. Remy, Bull. Soc. Belge. Phys. Ser. 4: 4 (1964).Google Scholar
- 29.R. W. Grant, H. Wiedersich, A. H. Muir, Jr., U. Gonser, and W. N. Delgass, to be published in J. Chem. Phys.Google Scholar
- 33.R. W. Grant and W. N. Delgass, unpublished data.Google Scholar