Abstract

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.

Department(s)

Chemistry

Keywords and Phrases

Antimony; Iron; Chemical Structure; Covalent Bond; Isomerism; Mössbauer Spectroscopy; Review; Temperature Dependence

International Standard Serial Number (ISSN)

1631829

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2000 American Physical Society (APS), All rights reserved.

Included in

Chemistry Commons

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