Electric quadrupole interaction of 100Rh in antimony, hafnium and rhenium |
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| Authors: | W J Kemp A A Abiona P Kessler H Timmers |
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| Institution: | 1. School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, UNSW Canberra, PO Box 7916, Canberra, 2610, Australia
2. Helmholtz-Institut für Strahlen- und Kernphysik, Nu?allee 14-16, 53115, Bonn, Germany
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| Abstract: | The effects of the Mg(II)/Fe(III) ratio on the structure and Fe microenvironments in MgFe LDH substances were investigated. The LDHs were prepared by the co-precipitation method with Mg(II)/Fe(III) ratios from 2:1 to 6:1. The materials were characterized by 57Fe Mössbauer spectroscopy and powder X-ray diffractometry. The 57Fe Mössbauer spectra exhibited asymmetric doublet corresponding to high-spin Fe(III) microenvironments in all LDH structure. It was found that the quadrupole splitting decreased with increasing Mg(II)/Fe(III)ratio reflecting change in the electric field gradient due to the incorporation of different amounts of iron into the Mg-containing layers. |
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