کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5413562 | 1393487 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The structure of concentrated aqueous solutions of chromium nitrate and cerium chloride studied by X-ray diffraction and Raman spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Concentrated aqueous solutions of chromium nitrate and cerium chloride were investigated by X-ray diffraction and Raman spectroscopy. The X-ray diffraction patterns of two sets of solutions (1.60 up to 2.48 mol dmâ 3 for chromium nitrate and 0.98 up to 2.81 mol dmâ 3 for cerium chloride) display an intense maximum, prepeak, in the angular region about Q0 â¼Â 0.9 Ã
â 1 (Q = 4 Ï sin θ / λ, θ being the diffracting angle). The value of Q0 corresponding to these maxima is proportional to the power 1/3 of the molar concentration. The proportionality coefficient has the value that should be observed for a close packing (fcc network) if assumed for cations. This study demonstrates, once more, the existence of an intermediate range order (up to â¼Â 10 Ã
) in very concentrated aqueous solutions of salts constituted by small ions of different valences, range order previously reported by these authors in many articles. Raman experiments are in consonance with X-ray diffraction results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 136, Issue 3, 15 December 2007, Pages 323-330
Journal: Journal of Molecular Liquids - Volume 136, Issue 3, 15 December 2007, Pages 323-330
نویسندگان
M. Isabel Cabaço, M.I. de Barros Marques, A.M. Gaspar, M. Alves Marques, M. Margarida Costa,