【摘要】 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...更多还原

【Abstract】 The molybdenum（Ⅳ）oxides of formula Ln₂Mo₃O₉ were obtained by reduction ofα-Ln₂Mo₃O₁₂（Ln=La,Pr,Nd, Sm,Gd,Dy）as well as Ce₂Mo₃O_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 Ln₂Mo₃O₉.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.更多还原