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High-Resolution Transmission Electron Microscopy of Defects in Todorokite (Oms-1)

Published online by Cambridge University Press:  02 July 2020

S. Turner  and
P.R. Buseck
S. Turner
Affiliation:
Surface and Microanalysis Science Division, Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, MD20899
P.R. Buseck
Affiliation:
Departments of Chemistry and Geology, Arizona State University, Tempe, AZ85287
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Extract

Todorokite is a manganese oxide mineral that occurs in widespread terrestrial and marine deposits. It is a major component of manganese nodules which occur in large quantities on ocean and some lake floors (>1012 tons). Todorokite has been linked to the presence of potentially mineable transition elements in manganese nodules. Todorokite is an octahedral molecular sieve material and has been termed by some in the chemical community as OMS-1. Many of the properties of synthetic and natural varieties have been characterized and potential applications include use for adsorption, as oxidation catalysts and in electrochemical devices.

The todorokite structure consists of a framework of MnO6 octahedra that are edge- and corner-linked to form tunnel structures. Several tunnel structures have been found in naturally occurring todorokite ranging from the most basic 3×3 structure to 3×8 and larger structures. Large cations and water occur in the tunnel interiors.

Type
Geology and Mineralogy
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 765 - 766
Copyright
Copyright © Microscopy Society of America 1997

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References

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