Vibrational spectroscopic study of hydrated uranyl oxide: Curite |
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Authors: | Ray L Frost Ji?í ?ejka Godwin A Ayoko Matt L Weier |
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Institution: | 1. Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia;2. National Museum, Václavské náměstí 68, 115 79 Praha 1, Czech Republic |
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Abstract: | Raman and infrared spectra of the uranyl oxyhydroxide hydrate: curite is reported. Observed bands are attributed to the (UO2)2+ stretching and bending vibrations, U–OH bending vibrations, H2O and (OH)− stretching, bending and librational modes. U–O bond lengths in uranyls and O–H…O bond lengths are calculated from the wavenumbers assigned to the stretching vibrations. These bond lengths are close to the values inferred and/or predicted from the X-ray single crystal structure. The complex hydrogen-bonding network arrangement was proved in the structures of the curite minerals. This hydrogen bonding contributes to the stability of these uranyl minerals. |
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Keywords: | Curite Uranyl mineral Raman and infrared spectroscopy U&ndash O bond lengths in uranyl Hydrogen-bonding network |
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