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介绍了近年来关于变价稀土元素Ｅｕ价态研究的最新进展，总结了Ｅｕ２＋的价态稳定和转换及其与基质结构、取代离子半径电荷、共掺杂稀土离子电子构型之间的关系和规律
The recent progress in the study of the valence state of the rare earth element Eu was introduced. The valence state stability and transition of Eu2 + and its relationship with the matrix structure, the substituted ionic radius charge and the co-doping rare earth ion electronic configuration were summarized