کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10632158 | 992391 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rietveld refinements of the solid solution Li(1â2x)NixTiO(PO4) (0 â¤Â x â¤Â 0.50)
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Li(1â2x)NixTiO(PO4) oxyphosphates with 0 â¤Â x â¤Â 0.10 crystallize in the orthorhombic system with the space group Pnma, those with 0.10 < x â¤Â 0.25 crystallize in the monoclinic system with the space group P21/c and compositions with 0.25 < x < 0.50 present a mixture of the limit of the solid solution Li0.50Ni0.25TiO(PO4) and Ni0.50TiO(PO4). The structure of the compositions 0 â¤Â x â¤Â 0.25 is based on a three-dimensional anionic framework constructed of chains of alternating TiO6 octahedra and PO4 tetrahedra, with the lithium and nickel atoms in the cavities in the framework. The dominant structural units in the compositions are chains of tilted corner-sharing TiO6 octahedra running parallel to one of the axis. The oxygen atoms of the shared corners, not implied in (PO4) tetrahedra, justify the oxyphosphate designation. Titanium atoms are displaced from the geometrical center of the octahedra resulting in alternating long (â2.25 Ã
) and short (â1.71Â Ã
) TiO(1) bonds. The four remaining TiO bond distances have intermediate values ranging from 1.91 to 2.06Â Ã
.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 40, Issue 2, 15 February 2005, Pages 229-238
Journal: Materials Research Bulletin - Volume 40, Issue 2, 15 February 2005, Pages 229-238
نویسندگان
B. Manoun, A. El Jazouli, P. Gravereau, J.P. Chaminade,