Study on F-F Transitions of Powdered Neodymium Compounds by Photoacoustic Spectroscopy  

作　　者：杨跃涛 苏庆德 赵贵文 张淑仪 

机构地区：[1]StateKeyLaboratoryofModernAcoustics,InstituteofAcoustics,NanjingUniversity,Nanjing210093，China [2]DepartmentofChemistry,UniversityofScienceandTechnologyofChina,Hefei230026,China

出　　处：《Journal of Rare Earths》2002年第1期10-14,共5页稀土学报（英文版）

基　　金：theNationalNaturalScienceFoundationofChina ( 196 340 5 0 )

摘　　要：Photoacoustic (PA) spectra of powdered neodymium oxide (Nd 2O 3 (A type)), neodymium hydrated chloride (NdCl 3·6H 2O) and neodymium fluoride (NdF 3) were reported. PA band shifts as compared to their positions in aqueous Nd 3+ are used to calculate the nephelauxetic parameters of the compounds. The variation of these parameters and correlation with the nature of metal ligand bonding were discussed. A novel method is introduced to determine the relative values of oscillator strengths and Judd Ofelt parameters of powdered samples using PA spectroscopy. It is found that a linear correlation exists between relative values of τ 2 and oscillator strengths of hypersensitive transitions of the title compounds. It is hopetul that the new method of PA technique may serve for the Judd Ofelt quantitative analysis of powdered rare earth compounds.Photoacoustic (PA) spectra of powdered neodymium oxide (Nd 2O 3 (A type)), neodymium hydrated chloride (NdCl 3·6H 2O) and neodymium fluoride (NdF 3) were reported. PA band shifts as compared to their positions in aqueous Nd 3+ are used to calculate the nephelauxetic parameters of the compounds. The variation of these parameters and correlation with the nature of metal ligand bonding were discussed. A novel method is introduced to determine the relative values of oscillator strengths and Judd Ofelt parameters of powdered samples using PA spectroscopy. It is found that a linear correlation exists between relative values of τ 2 and oscillator strengths of hypersensitive transitions of the title compounds. It is hopetul that the new method of PA technique may serve for the Judd Ofelt quantitative analysis of powdered rare earth compounds.

关 键 词：rare earths photoacoustic spectroscopy NEODYMIUM f  f transition oscillator strength 

分 类 号：O657.3[理学—分析化学]