The temperature dependence of the isomer shift of α-iron between 4.2 and 990 K and of Dy3Fe5O12 between 4.2 and 550 K has been analyzed in terms of the Debye model for the second-order Doppler shift, a model in which an additional parameter, the effective vibrating mass, is included. This mass is found equal to 57 g/mol in the ionic compound, Dy3Fe5O12, and equal to 60 g/mol in metallic α-iron. The deviation of this mass from 57 g/mol is a measure of the covalency of the metallic bonding in α-iron. The inadequacy of the graphical procedure proposed by Rechenberg, based on the treatment of second-order terms in the temperature dependence of the isomer shift, is also illustrated.
G. J. Long et al., "Reply to "Comment on 'Mössbauer Effect Study of Filled Antimonide Skutterudites'"," Physical Review B - Condensed Matter and Materials Physics, vol. 62, no. 10, pp. 6829-6831, American Physical Society (APS), Sep 2000.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevB.62.6829
Keywords and Phrases
Antimony; Iron; Chemical Structure; Covalent Bond; Isomerism; Mössbauer Spectroscopy; Review; Temperature Dependence
International Standard Serial Number (ISSN)
Article - Journal
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