Electrical Properties and Cation Valencies in Mn3O4
- 1 May 1988
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 71 (5) , 379-385
- https://doi.org/10.1111/j.1151-2916.1988.tb05057.x
Abstract
The electrical conductivity and thermopower of Mn3O4 were measured in the temperature range 920° to 1530°C. Electrical conduction in cubic Mn3O4 is explained by the small polaron hopping of electron holes between Mn4+ and Mn3+ on octahedral sites. The concentrations of Mn4+ and Mn3+ are governed by the disproportionation equilibrium 2Mnoct3+⇄Mnoct4++ Mnoct2+. This model also explains the electrical behavior of NiMn2O4 and CuMn2O4.Keywords
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