Ln_2Mo_3O_9的制备、结构及电磁性质

Preparation,Structure,Electrical and Magnetic PropertieS of Ln_2Mo_3O_9

Ｌｎ＿２Ｍｏ＿３Ｏ＿９的制备、结构及电磁性质史发年，任玉芳，孟建（中国科学院长春应用化学研究所稀土化学与物理开放实验室长春１３００２２）关键词稀土钼酸盐，结构，电学性质，磁学性质高氧化态Ｍｏ￣（６＋）与稀土的复合氧化物研究得较多￣［１～４］，而低氧化...

The molybdenum(Ⅳ)oxides of formula Ln_2Mo_3O_9 were obtained by reduction ofα-Ln_2Mo_3O_(12)(Ln=La,Pr,Nd, Sm,Gd,Dy)as well as Ce_2Mo_3O_(12.25) in hydrogen at 500～650℃ for 60 hours,The compounds are of single phase and crystallize in tetragonal structurewith parameters a=0.5260nm～0.5131nm and c=1.18211nm～1.1122nm. There are twobroad absorption bands in the IR spectra of the Ln_2Mo_3O_9.All of the compounds are n-typesemiconductors with ρ_(r.t.)=92.13Ωcm～7.51Ωcm. Their electrical properties at 10～350℃and magnetic properties at 100～250K were measured.