Mössbauer study of the temperature dependence of electron delocalization in mixed valence freudenbergite. Issue 10 (29th May 2020)

• Record Type: Journal Article
• Authors: Cashion, John D.; Vance, Eric R.; Ryan, Dominic H.
• Is Part Of: Journal of the American Ceramic Society. Volume 103:Issue 10(2020)
• Page Start: 5496
• Page End: 5501
• Publication Date: 2020-05-29
• Subjects: electron delocalization -- freudenbergite -- iron titanate -- mixed valence -- Mössbauer effect; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.17190
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: The evolution of the electron delocalization in the ferrous subspectra in a sample of mixed valence ferrous‐ferric freudenbergite has been followed by Mössbauer spectroscopy from 6 K to 650 K. The spectral changes do not involve the ferric component, leading to the conclusion that it is due to a thermally driven delocalization of the sixth d‐electron on the ferrous ions. The phenomenon does not occur in samples of pure ferrous freudenbergite.