Pulsed neutron diffraction from GeS2-based sulphide glasses

✍ Scribed by A.C Hannon; B.G Aitken

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 118 KB
• Volume: 60
• Category: Article
• ISSN: 0022-3697
• DOI: 10.1016/s0022-3697(99)00144-4

✦ Synopsis

Pulsed neutron diffraction has been used to investigate the structure of stoichiometric 5(GeS 2 )•(As 2 S 3 ) glass. The high realspace resolution reveals chemical disorder in the form of homopolar bonds that cannot be clearly observed by any other direct structural probe. The sulphur-sulphur peak in the neutron correlation function is markedly less reliable than the cation-cation peak for quantifying the chemical disorder. For 5(GeS 2 )•(As 2 S 3 ) glass, the cation-cation coordination number, n XX , is 0.24 and this implies a sulphur-sulphur coordination number, n SS , of 0.13.