کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10632680 | 992433 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The calcium based fullerenoïd Ca33Bi22.7Al48O139.05: An enantiomorphic structure of strontium aluminate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The calcium based fullerenoïd Ca33Bi22.7Al48O139.05: An enantiomorphic structure of strontium aluminate The calcium based fullerenoïd Ca33Bi22.7Al48O139.05: An enantiomorphic structure of strontium aluminate](/preview/png/10632680.png)
چکیده انگلیسی
The aluminate Ca33Bi22.7Al48O139.05, having an enantiomorphic structure from the first fullerenoid oxide Sr33Bi24.25Al48O141.375, has been isolated. The structure, solved by X-ray single crystal diffraction is built up from an aluminate framework made of AlO4 tetrahedra connected through corners and forming a huge “Al84O210” sphere where the Al atoms are disposed like the carbon atoms in the C84 fullerene. Difference between the Ca and Sr-phases lies in the composition and the structure of the [BixOy] cluster stuffing the aluminate sphere. In the Ca-phase, the cluster formulated “Bi22.7O45.05” can be ideally described as built up from BiO6 octahedra, BiO4L trigonal bipyramids and BiO3L tetrahedra. The EDS chemical analyses reveal a large domain of cationic stoichiometry, as observed for the Sr-phase. The high resolution electron microscopy (HREM) images of regular zones are in good agreement with the images calculated from the single crystal structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 40, Issue 8, 11 August 2005, Pages 1388-1401
Journal: Materials Research Bulletin - Volume 40, Issue 8, 11 August 2005, Pages 1388-1401
نویسندگان
B. Mellenne, S. Boudin, R. Retoux, M. Hervieu, B. Raveau,