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Solid-state nuclear magnetic resonance study of the structure of lanthanum phosphate crystals and glasses

Published online by Cambridge University Press:  31 January 2011

Nancy E. Rashid ,
Brian L. Phillips  and
Subhash H. Risbud
Nancy E. Rashid
Affiliation:
Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
Brian L. Phillips
Affiliation:
Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
Subhash H. Risbud
Affiliation:
Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616
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Abstract

Lanthanum phosphate glasses were synthesized by melt quenching and characterized by x-ray diffraction, electron microprobe analysis, and solid-state nuclear magnetic resonance spectroscopy. A range of compositions near the metaphosphate composition (75 mol% P2O5) was examined. Comparison of 31P chemical shifts and shielding anisotropies of glasses with those of the crystalline phases of La(PO3)3 (metaphosphate) and LaP5O14 (pentaphosphate) were consistent with the presence of primarily chainlike Q2 phosphate groups.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 11 , November 2000 , pp. 2463 - 2467
Copyright
Copyright © Materials Research Society 2000

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