Quasielastic neutron scattering with in situ humidity control: Water dynamics in uranyl fluoride
| Autor: | Lee Trowbridge, Andrew Miskowiec, Eugene Mamontov, Kenneth W. Herwig, Brian B. Anderson, Marie C. Kirkegaard |
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| Rok vydání: | 2016 |
| Předmět: |
Aqueous solution
Scattering Chemistry Neutron diffraction Analytical chemistry General Physics and Astronomy 02 engineering and technology Uranyl fluoride 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Crystallography chemistry.chemical_compound Quasielastic neutron scattering Anhydrous Relative humidity 0210 nano-technology Water vapor |
| Zdroj: | Journal of Applied Physics. 119:094308 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | The structural phase diagram of uranyl fluoride (UO2F2), while incomplete, contains at least one anhydrous crystal structure and a second, zeolite-like structure with the formula [(UO2F2)(H2O)]7 ⋅ (H2O)4 that can be produced by adding water to the anhydrous structure. While traditional diffraction measurements can easily differentiate these crystals, additional aqueous structures (in general of the form UO2F2 + xH2O) have been proposed as well. We present results using a novel sample environment setup to intercalate water during a quasielastic neutron scattering measurement over the course of 86 h. Our sample environment allows low-pressure ( |
| Databáze: | OpenAIRE |
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