Octahedral tilting and ordering of vacancies in the fast ion conductor Li0.12La0.63TiO3 perovskite: a neutron diffraction study

Author(s):  
J. Sanz ◽  
J. A. Alonso ◽  
A. Varez ◽  
M. T. Fernández-Díaz
2020 ◽  
Vol 8 (25) ◽  
pp. 12446-12456 ◽  
Author(s):  
Kavish Kaup ◽  
Laidong Zhou ◽  
Ashfia Huq ◽  
Linda F. Nazar

An in situ variable-temperature neutron diffraction study of Li3PS4 reveals the structure and Li-ion diffusion pathways (via MEM and BVEL calculations) of the high temperature fast-ion conductor, α-Li3PS4, (Ea = 0.22 eV), and compares them to those of other polymorphs and the Si-substituted phase.


ChemInform ◽  
2005 ◽  
Vol 36 (43) ◽  
Author(s):  
Masahiro Kajitani ◽  
Motohide Matsuda ◽  
Akinori Hoshikawa ◽  
Stefanus Harjo ◽  
Takashi Kamiyama ◽  
...  

2018 ◽  
Vol 5 (1) ◽  
pp. 171401 ◽  
Author(s):  
Anita Zeidler ◽  
Philip S. Salmon ◽  
Dean A. J. Whittaker ◽  
Andrea Piarristeguy ◽  
Annie Pradel ◽  
...  

The transition from a semiconductor to a fast-ion conductor with increasing silver content along the Ag x (Ge 0.25 Se 0.75 ) (100− x ) tie line (0≤ x ≤25) was investigated on multiple length scales by employing a combination of electric force microscopy, X-ray diffraction, and neutron diffraction. The microscopy results show separation into silver-rich and silver-poor phases, where the Ag-rich phase percolates at the onset of fast-ion conductivity. The method of neutron diffraction with Ag isotope substitution was applied to the x =5 and x =25 compositions, and the results indicate an evolution in structure of the Ag-rich phase with change of composition. The Ag–Se nearest-neighbours are distributed about a distance of 2.64(1) Å, and the Ag–Se coordination number increases from 2.6(3) at x =5 to 3.3(2) at x =25. For x =25, the measured Ag–Ag partial pair-distribution function gives 1.9(2) Ag–Ag nearest-neighbours at a distance of 3.02(2) Å. The results show breakage of Se–Se homopolar bonds as silver is added to the Ge 0.25 Se 0.75 base glass, and the limit of glass-formation at x ≃28 coincides with an elimination of these bonds. A model is proposed for tracking the breakage of Se–Se homopolar bonds as silver is added to the base glass.


2005 ◽  
Vol 17 (16) ◽  
pp. 4235-4243 ◽  
Author(s):  
Masahiro Kajitani ◽  
Motohide Matsuda ◽  
Akinori Hoshikawa ◽  
Stefanus Harjo ◽  
Takashi Kamiyama ◽  
...  

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