Short, intermediate and mesoscopic range order in sulfur-rich binary glasses

Journal Article · Mon Sep 29 00:00:00 EDT 2008 · J. Non-Cryst. Solids

DOI:https://doi.org/10.1016/j.jnoncrysol.2005.11.002· OSTI ID:1007721

Bychkov, E; Miloshova, M; Price, D L; Benmore, C J; Lorriaux, A ^[1]

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1. CRS

Pulsed neutron and high-energy X-ray diffraction, small-angle neutron scattering, Raman spectroscopy and DSC were used to study structural changes on the short, intermediate and mesoscopic range scale for sulfur-rich AsS{sub x} (x {ge} 1.5) and GeS{sub x} (x {ge} 2) glasses. Two structural regions were found in the both systems. (1) Between stoichiometric (As{sub 2}S{sub 3} and GeS{sub 2}) and 'saturated' (AsS{sub 2.2} and GeS{sub 2.7}) compositions, excessive sulfur atoms form sulfur dimers and/or short chains, replacing bridging sulfur in corner-sharing AsS{sub 3/2} and GeS{sub 4/2} units. (2) Above the 'saturated' compositions at [As] < 30.5 at.% and [Ge] < 27 at.%, sulfur rings and longer sulfur chains (especially in the AsS{sub x} system) appear in the glass network. The glasses become phase separated with the domains of 20-50 {angstrom}, presumably enriched with sulfur rings. The longer chains Sn are not stable and crystallize to c-S{sub 8} on ageing of a few days to several months, depending on composition.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: USDOE
• OSTI ID: 1007721
• Journal Information: J. Non-Cryst. Solids, Vol. 352, Issue (1) ; 01, 2006; ISSN 0022-3093
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ATOMS
CHAINS
DIMERS
GLASS
NEUTRONS
RAMAN SPECTROSCOPY
SCATTERING
SULFUR
X-RAY DIFFRACTION