Neutron diffraction study of the structure of saturated sodium-ammonia solutions
| Autor: | Sotiris Masmanidis, Shusaku Hayama, Jonathan C. Wasse, Sarah L. Stebbings, Neal T. Skipper |
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| Rok vydání: | 2002 |
| Předmět: |
Diffraction
Sodium Neutron diffraction Analytical chemistry Solvation chemistry.chemical_element Condensed Matter Physics Alkali metal Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Ion Solvent Crystallography chemistry Materials Chemistry Physical and Theoretical Chemistry Valence electron Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. :341-352 |
| ISSN: | 0167-7322 |
| Popis: | The structure of saturated solutions of sodium in ammonia at 200 K has been measured by using the method of isotope substitution in neutron diffraction. Substitution of ∗ N by 15 N, combined with difference analysis, yields detailed structural information about the local environment around the host solvent. We find that the solutions are structured over both short- and intermediate-length scales. The solvent structure is significantly “stretched” due to the presence of excess valence electrons, which reduce the overall density. The data are consistent with five-fold ammoniation of sodium, with a nearest neighbour NaN distance of 2.45(2) A. Contacts between solvated sodium ions then give rise to a first diffraction peak at 0.85(3) A −1 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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