Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1483289 | Journal of Non-Crystalline Solids | 2007 | 5 Pages |
Abstract
The structures of liquid Rb-Hg alloys were studied as a function of composition by neutron diffraction. In the intermediate Rb concentration range, the obtained structure factors show a small prepeak, which may be an evidence of the formation of Hg polyanion units in liquids. The Reverse Monte Carlo (RMC) analysis was applied to separate the total radial distribution function into the corresponding partial radial distribution functions. Up to 10Â at.% Rb, no obvious changes are found for the first peak position of the partial radial distribution functions of the Hg-Hg pair and that of the Hg-Rb pair. The first peak position between the Hg-Rb pairs increases above 20Â at.% Rb. In addition to the first peak, a subpeak between Hg-Hg pairs can be seen in the large distance. At 60Â at.% Rb, the nearest neighbor distance between Hg atoms shows the closest value in the concentration range studied. These results indicate that with the progress of charge transfer the solvation structure in the dilute Rb concentration range changes into the structure containing polyanions composed of Hg species.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A. Mizuno, T. Itami, G. Ferlat, A. San-Miguel, J.F. Jal,