摘要
本文用DTA、X-ray粉末衍射和荧光光度计等方法研究了EuI2的相变和结构及荧光性质.用退火和淬火的方法得到了EuI2的三种不同结构,并在荧光光谱上有不同的反映.首次发现EuI2的低温变体,EuI2-Ⅲ,正交晶系,空间群为Pnma,a=1.2287nm,b=0.4887nm,c=0.8384nm,Z=4.
he phase transition structure and fluorescence spectra of EuI_2 are studied by DTA,X-ray powder diffraction and fluorescene. Three different modifications of EuI_2 are obtained by means of annealing and quenching and have been identified by X-ray powder diffraction and fluorescence spectra. A new orthorhombic structure (EuI_2-Ⅲ) exists at lower temperature with: a = 1 .2287nm. b = 0.4887nm, c = 0.8384nm, Z = 4.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1995年第1期93-96,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金
中科院希土化学与物理开放实验室资助
国家基础研究8.5攀登基金
关键词
相变
结构
荧光光谱
碘化铕
curopium diiodide
phase transition
structurefluorescence spectra