کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1411291 | 1501854 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystal structure of UO2SO4·2.5H2O: Full anisotropic refinement and vibration characteristics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
UO2SO4·2.5H2O is monoclinic, space group P21/c (No. 14), unit-cell parameters of a = 6.7260(1)Ã
, b = 12.4210(2)Ã
, c = 16.8270(3)Ã
, β = 90.781(1)° with unit-cell volume V = 1405.66(4)Ã
3, Z = 8, Dcalc = 3.84 g/cm3. Two distinct uranium atoms, present as uranyl (UO2)2+, forming uranyl pentagonal bipyramids, two distinct sulfur atoms, forming sulfate tetrahedra and 17 oxygen atoms are present in the asymmetric part of its unit-cell. Two of oxygen atoms are water molecules bonded to the uranyl cation and one is water molecule bonded only by hydrogen-bonding. Crystal structure was refined fully anisotropically. Vibration modes of each molecular unit in Raman and infrared spectra were tentatively assigned and discussed, regarding refined structure. Inferred U-O lengths and hydrogen bond lengths are consistent with the crystal structure refinement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 936, Issues 1â3, 12 November 2009, Pages 75-79
Journal: Journal of Molecular Structure - Volume 936, Issues 1â3, 12 November 2009, Pages 75-79
نویسندگان
VojtÄch VlÄek, JiÅà Äejka, Ivana CÃsaÅová, Viktor GoliáÅ¡, Jakub PláÅ¡il,