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利用电介质的平均能带模型计算了 ＲＥＢａ２Ｃｕ３Ｏ７（ＲＥ＝Ｅｕ，Ｙ）的化学键参数，得到 Ｃｕ（１）－Ｏ键的平均共价性为０．４１， Ｃｕ（２）－Ｏ 键的平均共价性为 ０．２８．应用由共价性和极化率定义的化学环境因子计算了５７Ｆｅ和１１９Ｓｎ在 ＲＥＢａ２Ｃｕ３Ｏ７中的 Ｍｏｓｓｂａｕｅｒ同质界能位移，确定了 ５７Ｆｅ在 ＥｕＢａ２Ｃｕ３Ｏ７和 １１９Ｓｎ在 ＹＢａ２Ｃｕ３Ｏ７中的价态和占位情况
The chemical bond parameters of REBa2Cu3O7 (RE = Eu, Y) were calculated using the average energy band model of the dielectric. The average covalentness of Cu (1) -O bonds was found to be 0.41. The average covalentness of Cu (2) -O bonds Sex is 0.28. The Mossbauer homogenous energy shift of 57Fe and 119Sn in REBa2Cu3O7 was calculated using chemical environmental factors defined by covalency and polarizability, and the valence and occupancy of 57Fe in YBa2Cu3O7