Structure-Property Relations and Diffusion Pathways of the Silver Ion Conductor Ag5Te2Cl

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• 作者：Tom Nilges ; Sara Nilges ; Arno Pfitzner ; Thomas Doert ; and Peter Bö ; ttcher
• 刊名：Chemistry of Materials
• 出版年：2004
• 出版时间：March 9, 2004
• 年：2004
• 卷：16
• 期：5
• 页码：806 - 812
• 全文大小：576K
• 年卷期：v.16,no.5(March 9, 2004)
• ISSN：1520-5002

文摘

Single-crystal structure determinations at room temperature and elevated temperatureswere carried out on the silver ion conductor Ag₅Te₂Cl, and the hitherto unknown structureof the room-temperature phase (-Ag₅Te₂Cl) was determined. Ion pathways are discussedfor the room- and high-temperature phase by analyzing the joint probability density functions.Main transport pathways at different temperatures were worked out to obtain detailedinsight into the movement of the silver atoms in this material. Ag₅Te₂Cl is an excellent 1Dionic conductor having a pronounced silver mobility along complex silver columns.Conductivities are = 1.51 × 10^{-3 -1} cm^-1 at 323 K and = 4.30 × 10^{-1 -1} cm^-1 at 469K. With use of a nonharmonic description of the silver distribution of the high-temperaturephase, a promising structure model has been derived for the room-temperature phase.-Ag₅Te₂Cl can be regarded as an intermediate phase between the disordered high- and theordered low-temperature phase, showing an almost ordered silver distribution in additionto a slightly different arrangement of the anionic substructure.