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Cation Disorder Determined by MAS 27Al NMR in High Dose Neutron Irradiated Spinel

Published online by Cambridge University Press:  16 February 2011

Elizabeth A. Cooper
Affiliation:
Los Alamos National Laboratory, Materials Science and Technology Division, Los Alamos, NM 87545
Craig D. Hughes
Affiliation:
Los Alamos National Laboratory, Chemical Science and Technology Division, Los Alamos, NM 87545
William L. Earl
Affiliation:
Los Alamos National Laboratory, Chemical Science and Technology Division, Los Alamos, NM 87545
Kurt E. Sickafus
Affiliation:
Los Alamos National Laboratory, Materials Science and Technology Division, Los Alamos, NM 87545
Glenn W. Hollenberg
Affiliation:
Pacific Northwest Laboratories, Materials Science Department, Richland, WA 99352
Frank A. Garner
Affiliation:
Pacific Northwest Laboratories, Materials Science Department, Richland, WA 99352
Richard C. Bradt
Affiliation:
University of Alabama, Metallurgical and Materials Engineering, Tuscaloosa, Al 35487
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Abstract

Spinel (MgAl2O4) single crystals which had been neutron irradiated at (nominally) 400 and 750°C to high doses (53-250 dpa) were examined using 27Al magic angle spinning (MAS) nuclear magnetic resonance (NMR). The sensitivity of this procedure to a specific cation (Al) residing in different crystallographic environments allowed us to determine the distribution of the Al between the tetrahedral and octahedral cation sites in the spinel structure. Our results indicate that the Al was distributed nearly equally over both cation sites in the spinel, resulting in a nearly inverse structure.

Type
Research Article
Copyright
Copyright © Materials Research Society 1995

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References

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Cation Disorder Determined by MAS 27Al NMR in High Dose Neutron Irradiated Spinel
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