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本文测量了298.15K时La、Ce、Pr、Nd、Sm、Eu、Gd、Dy、Ho、Yb、Y十一种希土元素异硫氰酸盐水合物[RE(NCS)_3·nH_2O]在二甲基乙酰胺(DMA)水溶液中的积分溶解热以及相应的十一种希土元素异硫氰酸盐二甲基乙酰胺配合物[RE(NCS)_3·mDMA]在水中的积分溶解热。藉助于本文所设计的热化学循环,用本文所测得的积分溶解热数据和文献数据,求得了这十一种RE(NCS)_3·mDMA的标准生成焓,进而计算出了它们的晶格能。此外,还对Tb、Er、Tm、Lu四种RE(NCS)_3·mDMA的相应数据进行了估算。
In this paper, eleven kinds of rare earth element isothiocyanate hydrate [RE (NCS) 3 · nH 2 O] of La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Yb and Y The integrated heat of solution in aqueous dimethylacetamide (DMA) solution and the corresponding solution heats of eleven rare earth elements isothiocyanates dimethylacetamide complex [RE (NCS) _3 · mDMA] in water . With the help of the thermochemical cycle designed in this paper, the standard enthalpies of formation for the eleven kinds of RE (NCS) _3 · mDMA were obtained by integrating the thermal and literature data of the integrals measured in this paper, and their lattice can. In addition, the corresponding data of four kinds of RE (NCS) _3 · mDMA of Tb, Er, Tm and Lu are also estimated.