AEu_2I_5（A＝K，Rb，Cs）的合成及结构与性质研究

SYNTHESIS, CRYSTAL STRUCTURE AND PROPERTIES OF AEu2I5(A=K, Rb, Cs)

本文用一步反应合成了未见文献报道的化合物ＡＥｕ２Ｉ５（Ａ＝Ｋ，Ｒｂ，Ｃｓ），测定了这些化合物的组成、结构、熔点、密度、极谱电位、固体荧光光谱及在四氢呋喃中的紫外可见吸收光谱，解释了固体荧光光谱，确定了化合物中Ｅｕ的实际价态是＋２．

The synthesis of AEu2I5(A=K, Rb, Cs) by a one-step method has been reported. The crystal structure of these compounds were determined by X-ray powder diffraction. The europiumvalence, which was determined from polarography and UV-absorbance spectrum,is 2+. Thecomposition, lattice parameters, melting point, density, polarogrphy voltage. UV-absorbancespectrum and fluorescence spectra of A Eu2I5 have been presented.