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Nucleation and medium Range Order in Silicate Liquids:Inferences From NMR Spectroscopy

Published online by Cambridge University Press:  15 February 2011

Jonathan R. Stebbins  and
Sabyasachi Sen
Jonathan R. Stebbins
Affiliation:
Department of Geological and Environmental Sciences, Stanford University, Stanford CA 94305–2115
Sabyasachi Sen
Affiliation:
Department of Geological and Environmental Sciences, Stanford University, Stanford CA 94305–2115
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Abstract

NMR spectroscopy is beginning to provide quantitative information on short-and medium-range structure in silicate glasses and liquids, and onmolecular-scale dynamics in the liquids. Data on coordination numbers,second and higher neighbor connectivities, and larger scale heterogeneities,as determined by NMR at ambient and high temperatures, are potentially veryuseful in models of nucleation and growth of immiscible liquid andcrystalline phases. New techniques such as dynamic angle spinning (DAS),high temperature magic angle spinning (MAS) are especially promising.Detailed studies of paramagnetic nuclear spin relaxation can characterizecompositional heterogeneity in glasses to distance scales of at leastseveral nanometers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 321: Symposium E – Crystallization and Related Phenomena in Amorphous Materials—Ceramics, Metals, Polymers, and Semiconductors , 1993 , 143
Copyright
Copyright © Materials Research Society 1994

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