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New Manganese Oxides by Hydrothermal Reaction of Permanganates

Published online by Cambridge University Press:  15 February 2011

Rongji Chen ,
Peter Zavalj  and
M. Stanley Whittingham
Rongji Chen
Affiliation:
Chemistry Department and Materials Research Center, State University of New York at Binghamton, Binghamton, NY 13902–6000, USA
Peter Zavalj
Affiliation:
Chemistry Department and Materials Research Center, State University of New York at Binghamton, Binghamton, NY 13902–6000, USA
M. Stanley Whittingham
Affiliation:
Chemistry Department and Materials Research Center, State University of New York at Binghamton, Binghamton, NY 13902–6000, USA
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Abstract

The mild hydrothermal decomposition of aqueous permanganate solutions has been found to lead to new layered manganes oxides. In the case of alkali permanganates, AMnO4, layered birnessite-type compounds are formed with the general formula - AxMnO2•nH2O. These compounds have R 3 m rhombohedral structures analogous to the layered disulfides. The water is reversibly lost on heating, and the compounds readily intercalate lithium ions in a reversible manner. In the case of the hydrothermal decomposition of tetramethylammonium permanganate in the presence of nickel, the new compound NiMnO3 is formed that has a novel structure. This compound also has interesting magnetic properties, being a paramagnet above 111K and a ferromagnetic below that temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 453: Symposium R – Solid State Chemistry of Inorganic Materials , 1996 , 653
Copyright
Copyright © Materials Research Society 1997

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References

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