Structure of fast ion conducting AgI–As2Se3 glasses
Structure of fast ion conducting AgI–As2Se3 glasses
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快离子导电 AgI-As2Se3 玻璃的结构
DOI：
10.1016/j.jnoncrysol.2007.05.036
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Y. Kameda
中科院分区：
文献类型：
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作者：
T. Usuki;K. Nakajima;T. Furukawa;M. Sakurai;S. Kohara;T. Nasu;Y. Amo;Y. Kameda
对(AgI)x(As2Se3)1−x玻璃进行了高能X射线衍射、中子衍射和扩展X射线吸收精细结构实验。大量AgI的加入不会显著影响主机网络矩阵的短程有序性，也就是说，在引入AgI时，(SE1/2)3锥体单元基本保持不变。Ag-I对的原子间距与结晶AgI的情况相似。然而，目前玻璃中的Ag-I配位数似乎比晶态AgI的配位数略小，这表明玻璃状态下AgI单元的四面体坐标严重扭曲或I-I亚笼的结构无序。
High-energy X-ray diffraction, neutron diffraction and extended X-ray absorption fine structure experiments have been carried out for (AgI)x(As2Se3)1−xglasses. The addition of a large amount of AgI does not significantly affect the short-range ordering of the host network matrix, that is, As(Se1/2)3pyramidal units remain essentially intact on introducing AgI. The interatomic distance of Ag–I pairs is similar to the case of crystalline AgI. However, the coordination number of Ag–I pairs in the present glasses seems to be somewhat smaller than that in the crystalline AgI, suggesting a heavy distortion of tetrahedral coordinates of AgI units or structural disorder of the I–I sub cages in the glass state.