Rietveld Refinement of New Ternary Compound Al_(14)Dy_5Si  

作　　者：何唯 张吉亮 曾令民 

机构地区：[1]Key Laboratory of Nonferrous Metals and New Processing Technology of Materials,Ministry of Education,Guangxi University

出　　处：《Journal of Rare Earths》2006年第z2期78-81,共4页稀土学报（英文版）

基　　金：Project supported by Guangxi Natural Science Foundation (0575001)

摘　　要：A new ternary compound Al14 Dy5Si was discovered and studied by means of X-ray powder diffraction technique. The ternary compound Al14Dy5Si has a hexagonal BaPb3-type structure, space group R 3m(No. 166), the lattice parameters a =0.61482(1) nm, c =2.09780(2) nm. The crystal structure of the compound Al14Dy5Si was successfully refined by using Rietveld method from X-ray diffraction data. The R-factors of Rietveld refinement are RP= 0.091 and Rwp = 0.120, respectively. The thermal dependence of the magnetization (M-T curves) for the compound was measured by a vibrating sample magnetometer. The experimentally determined magnetic effective paramagnetic moment isμeff = 23.22μB per formula unit (10.36μB per Dy atom).A new ternary compound Al14 Dy5Si was discovered and studied by means of X-ray powder diffraction technique. The ternary compound Al14Dy5Si has a hexagonal BaPb3-type structure, space group R 3m(No. 166), the lattice parameters a =0.61482(1) nm, c =2.09780(2) nm. The crystal structure of the compound Al14Dy5Si was successfully refined by using Rietveld method from X-ray diffraction data. The R-factors of Rietveld refinement are RP= 0.091 and Rwp = 0.120, respectively. The thermal dependence of the magnetization (M-T curves) for the compound was measured by a vibrating sample magnetometer. The experimentally determined magnetic effective paramagnetic moment isμeff = 23.22μB per formula unit (10.36μB per Dy atom).

关 键 词：Al 14Dy5Si crystal structure Rietveld method rare earths 

分 类 号：O614.31[理学—无机化学]