UNSPECIFIED (1998) The structure of tin silicate glasses. In: 7th International Conference on the Structure of Non-Crystalline Materials (NCM7), SEP 15-19, 1997, CAGLIARI, ITALY.

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Abstract

The structures of four tin silicate, SnO-SiO2, glasses have been studied using pulsed neutron diffraction to investigate the environment of Sn2+. The glass structure is based on a tetrahedral [SiO4] network and we find that the mean Si-O distance increases slightly as SnO is added. The tin atoms have a well-defined environment, indicating that tin takes the role of a conditional glass former for all compositions. The predominant coordination polyhedron for Sn2+ is a [SnO3] triangular pyramid, although a minority of Sn2+ are in a [SnO4] square pyramid environment. particularly for the higher silica compositions. The majority of the oxygen-oxygen distances in both tin coordination polyhedra are the same as in the [SiO4] tetrahedra. No evidence has been found for a gross change in the short range order with composition which can be associated with a change in the physical properties. (C) 1998 Elsevier Science B.V. All rights reserved.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology > TP Chemical technology T Technology > TA Engineering (General). Civil engineering (General)
Journal or Publication Title:	JOURNAL OF NON-CRYSTALLINE SOLIDS
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0022-3093
Date:	July 1998
Volume:	232
Number of Pages:	9
Page Range:	pp. 300-308
Publication Status:	Published
Title of Event:	7th International Conference on the Structure of Non-Crystalline Materials (NCM7)
Location of Event:	CAGLIARI, ITALY
Date(s) of Event:	SEP 15-19, 1997
URI:	http://wrap.warwick.ac.uk/id/eprint/15439

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