Xanes Study of Fluctuation of Iron Valence in FeW₁₋ₓNbₓO₄ Solid Solutions

Author

Krishna B. Garg
Hari S. Chauhan
Usha Chandra
Kavita S. Jerath
Fernande Grandjean, Missouri University of Science and TechnologyFollow

Abstract

K-absorption edge of iron in FeW_1-xNb_xxO₄ with 0 < x < 1 solid solutions was measured with high resolution using synchrotron radiation. The edge and the white line are found to shift to higher energy with increasing Nb content due possibly to presence of Fe²⁺ and Fe³⁺. In addition, the white line develops a two peak structure with the second peak growing in intensity with increasing Nb content: a definite indication of valence fluctuation. After examining various interpretations, we conclude an IV state for iron as a consequence of configurational fluctuation in this series.

Recommended Citation

K. B. Garg et al., "Xanes Study of Fluctuation of Iron Valence in FeW₁₋ₓNbₓO₄ Solid Solutions," Solid State Communications, vol. 62, no. 8, pp. 575 - 578, Elsevier, May 1987.

The definitive version is available at https://doi.org/10.1016/0038-1098(87)91090-8

Department(s)

Chemistry

Keywords and Phrases

Solid Solutions - Spectroscopic Analysis; Spectroscopy; Absorption - Applications; Iron Valence; Valence Fluctuation; Xanes; Iron Compounds

International Standard Serial Number (ISSN)

0038-1098

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1987 Elsevier, All rights reserved.

Publication Date

01 May 1987