کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1297974 | 973921 | 2008 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A composite modulated structure mechanism for Ag+ fast ion conduction in pearceite and polybasite mineral solid electrolytes
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
A careful electron diffraction investigation of pearceite-Tac and polybasite-Tac samples in the Ag+ fast ion conducting state reveals that the average hexagonal [AgI9]9+ sub-structure in these mineral solid electrolyte systems is mutually incommensurable with respect to the remaining [(AgI,CuI)6(AsIII,SbIII)2S7]2â[CuIS4]7â framework sub-structure. It is shown how the mutual incommensurability of the two component sub-structures can be compatible with crystal chemical commonsense, with previously reported average structure refinements of these phases as well as providing an insight into their Ag+ fast ion conductivity at such low temperatures. In addition, Ag+/Cu+ ion ordering (and associated displacive shifts of the centreing S2â ions) in the S2â(Ag,Cu)6 octahedral sites is shown to provide a mechanism for low temperature superstructure ordering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 179, Issue 37, 15 November 2008, Pages 2080-2089
Journal: Solid State Ionics - Volume 179, Issue 37, 15 November 2008, Pages 2080-2089
نویسندگان
R.L. Withers, L. Norén, T.R. Welberry, L. Bindi, M. Evain, S. Menchetti,