A STUDY ON MICROSCOPIC STRUCTURE IN INCOMPLETELY HYDRATED MELTS

对不完全水合的EuCl_3、DyCl_3、LiBr和HCOOLi熔体以及高浓度甲醇LiBr和Lil溶液进行了x射线异常散射、中子同位素取代衍射和各向同性拉曼光谱研究，以获得这些溶液中组成离子周围局部结构的详细信息。对过量Cl^- (Dy^<3+>: Cl^-= 1:6)的DyCl_3浓水溶液进行结构分析，证实了接触离子对的存在，Dy^<3+>Cl^- (r_<DyCl>=2.9A)。用中子衍射和拉曼散射方法测定了Li^+在高浓度LiBr、HCOOLi水溶液和甲醇LiBr、Lil溶液中的溶剂化结构。得到了这些溶液中接触离子对Li^+X^- （X=Br， l和HCOO）的结构细节。通过对高浓度HCOONa水溶液的x射线、中子和拉曼分析，推导了Na^+和HCOO^-的水化结构。

X-ray anomalous scattering, neutron diffraction with isotopic substitution and Isotropic Raman spectroscopic studies have been carried out for incompletely hydrated EuCl_3, DyCl_3, LiBr and HCOOLi melts, and highly concentrated methanolic LiBr and Lil solutions, in order to obtain detailed information on the local structure around constituent ions in these solutions. Stuctural analysis of concentrated aqueous DyCl_3 solution with excess amount of Cl^- (Dy^<3+> : Cl^-=1 : 6) evidenced the existence of contact ion pair, Dy^<3+>Cl^- (r_<DyCl>=2.9A). The solvation structure of Li^+ in highly concentrated aqueous LiBr, HCOOLi and methanolic LiBr and Lil solutions was determined by neutron diffraction and Raman scattering methods. Details of the structure concerning the contact ion pair, Li^+X^- (X=Br, l and HCOO), in these solutions was obtained. The hydration structure of Na^+ and HCOO^- was deduced from the X-ray, neutron and Raman analyzes for highly concentrated aqueous HCOONa solution.