Neutron diffraction study on network structure of As2Se3–Ag2Se glasses and selenium coordination around silver atom
✍ Scribed by K Shirao; T Hattori; S Nishiyama; K Fukushima; Y Iwadate; M Misawa; T Fukunaga; T Nakazawa; K Noda
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 132 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0022-3697
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✦ Synopsis
The short range structure analysis of (1 Ϫ x)As 2 Se 3 -xAg 2 Se (x 0.05-0.30) glasses were studied by the time-of-flight (TOF) neutron diffraction method, and the effects of Ag 2 Se addition on the network structure of AsSe 3 trigonal pyramid were investigated.
The As-Se and Se-Se distances of the AsSe 3 trigonal pyramids in As 2 Se 3 -Ag 2 Se glasses were at 2.45-2.54 and 3.72-3.86 A ˚, respectively, and thus the bond angles of ЄSe-As-Se for the AsSe 3 trigonal pyramids in these glasses were calculated to be about 99.0Њ. These results indicate the existence of AsSe 3 trigonal pyramid structure in these glasses, but the shape was not as symmetrical as in crystalline As 2 Se 3 .