Raman spectral studies of uranyl sulphate and its urea complex structural isomers |
| |
| Institution: | 1. Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India;2. Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400 094, India;3. Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India;1. Department of Crystallography, St. Petersburg State University, University Emb. 7/9, 199034 St. Petersburg, Russia;2. National Research Nuclear University MEPhI, pr. Pobedy 48, 456783 Ozersk, Russia;1. Synchrotron Soleil, Saint-Aubin BP-48, 91192, France;2. Los Alamos National Laboratory, Los Alamos, NM 87545, United States;3. University of North Texas, Denton, TX 76203, United States;4. Universidad Marista de Merida, Merida, Yucatan 97300, Mexico;5. University of Washington, Seattle, WA 98195, United States;6. SLAC National Accelerator Laboratory, Menlo Park, CA 94025, United States;1. CNRS, CEMHTI UPR3079, Univ. Orléans, CS 90055, F-45071, Orléans, France;2. CEA/DEN/DEC Bat 352 Cadarache, F-13108, Saint Paul lez Durance, France;3. CEA/DEN/DTCD, Marcoule Research Center, F-30207, Bagnols-sur-Cèze, France;1. Joint Institute for Nuclear Research, Dubna, Russia;2. National Research Tomsk Polytechnic University, Tomsk, Russia |
| |
| Abstract: | Using Raman spectroscopy, the authors have studied two forms of the dioxouranium(VI) sulphate complexes of the urea molecule, the bis(urea)dioxouranium(VI) sulphates α- and β-UO2SO4·2CO(NH2)2. Raman spectra were recorded using λ = 488 and 647.1 nm laser excitation lines. For λ = 448 nm, the crystals exhibit strong, structured luminescence, with peaks separated by 857 cm?1 (α-form) and 853 cm?1 (β-form). For λ = 647.1 nm, very intense Raman spectra are obtained which are similar but slightly different and can be used to distinguish each form. A comparison with the urea and uranyl sulphate hydrate (USH) spectra has clarified the Raman band assignment of the two parent α- and β forms. Contributions of the urea donor ligand and the sulphate have been identified. Charge transfer to uranium and the uranium—oxygen force constant in the uranyl ion have been evaluated. The results agree with previous X-ray structural investigations. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
