Abstract The crystalstructure of the all studied compounds was refined in the monoclinic C2/m ( C 2 h 3 ) space group. The IR and Raman spectra of polycrystalline AgRE(WO4)2 have been recorded and analysed using the factor group approach. In the theoretical considerations the C2/m, P2/c and C2/c unit cell structures were taken into account. The change of the unit cell parameters induced by the RE ions exchange
摘要 所有研究化合物的晶体结构均在单斜C2/m ( C 2 h 3 ) 空间群中进行了细化。使用因子组方法记录和分析了多晶 AgRE(WO4)2 的红外和拉曼光谱。在理论考虑中,考虑了 C2/m、P2/c 和 C2/c 晶胞结构。分析了由稀土离子交换引起的晶胞参数的变化。已提出将观测频带分配给内部和外部模式。根据所研究的钨酸盐的振动行为对结构进行了验证。已经测量和分析了所研究的 AgRE(WO4)2 多晶的吸收、发射和激发光谱。
Development of Multivalent Ion Conducting Solid Electrolytes
作者:Nobuhito Imanaka、Shinji Tamura
DOI:10.1246/bcsj.20100178
日期:2011.4.15
Trivalent cation conduction has been successfully demonstrated by two strategies. One is crystal structure selection, and the other is the selection of the constituent ions in solids. Since the trivalent cations possess certain ionic volume, a suitable mobile ion pathway should appear in the structure. One candidate structure we selected is a two-dimensional layered structure and the other is a three-dimensional network crystal structure. The selection of the constituent ions in solids is performed by considering the electrostatic interaction between cations and anions in the structure.
consideration of the mobile trivalent ions and the structure which reduces the electrostatic interaction between the framework and the mobile trivalent ionic species as much as possible, a trivalent-ion conduction in solids was successfully realized with the Sc 2 (WO 4 ) 3 -type structure. Among the molybdates and the tungstates with the Sc 2 (WO 4 ) 3 -type structure, Sc 2 (WO 4 ) 3 and Sc 2 (MoO 4 ) 3 were