Abstract
The local structure of molten GdCl3 and its mixture in LiCl–KCl eutectic was investigated by Gd K-edge extended X-ray absorption fine structure (EXAFS) technique. As the result of curve fitting analysis, the nearest Gd3+–Cl− distance was 2.74±0.02Å with coordination number 6.5±0.3 in the pure melt. On the other hand, those in the 10% GdCl3 mixture melt decreased to 2.70±0.01Å and 6.1±0.3, respectively. These results suggest that octahedral coordination (GdCl6)3− structure is formed and stabilized by mixing with the alkali chlorides. The result was compared with that of YCl3 and LaCl3 in LiCl–KCl eutectic melt.
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