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Lone-pair effects and structural trends in xSnO center dot(1-x)P2O5 glasses deduced from P-31 and Sn-119 nuclear magnetic resonance

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UNSPECIFIED (2002) Lone-pair effects and structural trends in xSnO center dot(1-x)P2O5 glasses deduced from P-31 and Sn-119 nuclear magnetic resonance. JOURNAL OF PHYSICS-CONDENSED MATTER, 14 (49). pp. 13609-13621. ISSN 0953-8984.

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Abstract

Tin phosphate glasses, of general formula x SnO . (1 - x)P2O5 (0.3 < x < 0.8), have been prepared by conventional melt-quench techniques and their structures studied using P-31 and Sn-119 nuclear magnetic resonance. The distribution of [PO4] Q(n) species changes with composition in accordance with the simple binary model, and the changes in chemical shift can be explained by the redistribution of electron charge from the P=O double bond. Sn(II) is found to occupy a highly asymmetric site, typical of a sterically active lone pair of electrons. The Sn-119 parameters of the chemical shift tensor change systematically with x, reflecting the change in local environment from one where the next nearest neighbours are predominantly Q(2) phosphorus to one where they are predominantly Q(0) phosphorus.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: JOURNAL OF PHYSICS-CONDENSED MATTER
Publisher: IOP PUBLISHING LTD
ISSN: 0953-8984
Official Date: 16 December 2002
Dates:
DateEvent
16 December 2002UNSPECIFIED
Volume: 14
Number: 49
Number of Pages: 13
Page Range: pp. 13609-13621
Publication Status: Published

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