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A structural study of Li2S---B2S3 glasses by neutron diffraction

Estournesa, C and Owensb, AP and Menetriera, M and Levasseura, A and Rao, KJ and Elliottb, SR (1994) A structural study of Li2S---B2S3 glasses by neutron diffraction. In: Journal of non-crystalline solids, 171 (1). pp. 80-86.

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Official URL: http://dx.doi.org/10.1016/0022-3093(94)90034-5

Abstract

The radial distribution functions (RDFs) of five xLi2S.(1 - x)B2S3 glasses (x = 0.55, 0.60, 0.67, 0.71 and 0.75) have been determined from neutron diffraction experiments performed at the Institut Laue-Langevin, Grenoble. These glasses are prepared by casting a molten mixture of boron, sulphur and Li2S inside a controlled atmosphere glovebox. Addition of the Li2S Modifier is found gradually to suppress all peaks corresponding to interatomic distances > 3.5 angstrom, which implies that the structural entities present in these glasses become segmented, and therefore more ionic, as x increases. The assumption of the existence of four main structural entities based on four- and three-coordinated borons (the latter carrying bridging and/or non-bridging sulphurs) accounts for all the peaks present in the RDFs as a function of composition. Furthermore, in the most modified glass (x = 0.75), that which contains only 'isolated' BS33- triangles, there seems to be evidence for either octahedral or tetrahedral coordination of Li+ by S- ions

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 03 Jun 2011 05:24
Last Modified: 03 Jun 2011 05:24
URI: http://eprints.iisc.ernet.in/id/eprint/36251

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