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23Na chemical shifts and local structure in crystalline, glassy, and molten sodium borates and germanates

✍ Scribed by A.M. George; S. Sen; J.F. Stebbins

Book ID: 104357896
Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 808 KB
Volume: 10
Category: Article
ISSN: 0926-2040
DOI: 10.1016/s0926-2040(97)00072-6

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✦ Synopsis

A simple correlation between average Na-0 bond length and 23Na isotropic chemical shift in crystalline germanates and borates has been established, similar to existing correlations for sodium in silicates and carbonates. This empirical trend is discussed in terms of a decreasing paramagnetic contribution to the chemical shift with increasing average bond length. The correlation is then applied to data for sodium borate and germanate glasses and melts from room temperature to 12OO"C, where both structural and compositional effects on the chemical shift are apparent. 0 1997 Elsevier Science B.V.

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