Crystal structures and sodium/silver distributions within the ionic conductors Na5Ag2Fe3(As2O7)4 and Na2Ag5Fe3(P2O7)4

被引：6
|
作者：
Quarez, Eric [1 ]
Mentre, Olivier [2 ]
Djellab, Karim [1 ]
Masquelier, Christian [1 ]
机构：
[1] Univ Picardie Jules Verne, CNRS, Lab Reactivite & Chim Solides, UMR 6007, F-80039 Amiens, France
[2] ENSC Lille UST Lille, CNRS, Equipe Chim Solide, UCCS,UMR 8181, F-59652 Villeneuve Dascq, France
来源：
NEW JOURNAL OF CHEMISTRY | 2010年 / 34卷 / 02期
关键词：
CONDUCTIVITY; SODIUM; FE; PHOSPHATES; ELECTRODE; GA; CR; NATI2(PO4)3; FAMILY; M=AL;
D O I：
10.1039/b9nj00355j
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The crystal structures of new Na5Ag2Fe3(As2O7)(4) and Na2Ag5Fe3(P2O7)(4) compounds, prepared through ion exchange from Na7Fe3(X2O7)(4) (X = P, As) are reported. They crystallize in the monoclinic C2/c space group and exhibit a Na/Ag ordering on cooling. Crystal structures were determined from single crystal X-ray diffraction at 100 and 298 K for each composition. The structure consists of FeO6 octahedra sharing their corners with X2O7 dimers (X = P, As) to form a three-dimensional framework [Fe-3(X2O7)(4)](7-) into which the sodium/silver ions are located. The differences between the four structures lie on the distribution of the sodium/silver ions within this framework giving a developed insight of the ionic diffusion paths.
引用
收藏
页码：287 / 293
页数：7
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