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Acta Metall Sin  1995, Vol. 31 Issue (15): 97-102    DOI:
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COMPUTERIZED SIMULATION OF STRUCTURE OF DyF_3-BaF_2-LiF MOLTEN SYSTEM
XU Chi; SU Hang; CHEN Nianyi (Shanghai Institute of Metallurgy; Chinese Academy of Sciences; Shanghai 200050) LI Jie;TANG Dingxiang (Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022)
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XU Chi; SU Hang; CHEN Nianyi (Shanghai Institute of Metallurgy; Chinese Academy of Sciences; Shanghai 200050) LI Jie;TANG Dingxiang (Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022). COMPUTERIZED SIMULATION OF STRUCTURE OF DyF_3-BaF_2-LiF MOLTEN SYSTEM. Acta Metall Sin, 1995, 31(15): 97-102.

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Abstract  The structure of molten DyF_3-BaF_2-LiF system has been simulated by Monte Carlo method. The radial distribution functions (RDFs), the local structure as well as the energy distribution have been obtained. The study indicates that F-ions distribute closely around Dy~(3+) ions and form mainly octahedral complex ions like DyF_6~(3-). There exist some "free" Li~+ ions in the molten system, they have the highest potential energy and are currentcarrying ions in the electrolytic conductance. F~-ions may be classified into three types: "terminal fluoride", "free fluoride", and "bridged fluoride", which have different behaviours. and their potential energies are also different. Some complex ions like DyF_m~(3-m) clusters are connected to one another by "flouride-bridge", forming more complicated ionic cluster like F_m-Dy-F-Dy-F_n or F_m-Dy< >Dy-F_n. As compared with molten DyF_3-LiF system.the octahedral complex ions like DyF_6~(3-) seems more close and more order than the binary system because of adding of BaF_2.
Key words:  rare-earth fluoride      molten salt      computerized simulation      Monte Carlo method      local structure     
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