Citation: X.L. WANG, S.X. SHANG, Z.P. AI, H. WANG, H.C. CHEN, M.H. JIANG. A NEW RARE-EARTH VANADATE LaBa₂V₃O₁₁[J]. Chinese Chemical Letters, ;1993, 4(6): 551-554. shu

A NEW RARE-EARTH VANADATE LaBa₂V₃O₁₁

X.L. WANG ^1,2 ,
S.X. SHANG ² ,
Z.P. AI ² ,
H. WANG ^1,2 ,
H.C. CHEN ^1,2 ,
M.H. JIANG ^1,2

1.
Institute of Crystal Materials, Shandong University, Jinan 250100, Shandong;
2.
Experimental Center, Shandong University, Jinan 250100, Shandong

Received Date: 22 September 1992

Fund Project: This work is supported by Youth Science Fund of Shandong University.

A new rare-earth vanadate LaBa₂V₃O₁₁ is synthesized by the conventional solid state reaction.The single phase can be obtained at sintering temperature of 1010℃. The X-ray powder diffraction shows that the new compound has tetragonal structure with cell parameters a of 7.94 and c of 24.27 Å The LaBa₂V₃O₁₁ can be decomposed to LaVO4.Ba3(VO₂)₂ and V₂O₅ by higher sitering temperature than 1010℃.The as-sintered sample is insulator with resistivity of 10¹² ohm cm.Furthermore,if the as-sintered sample was annealed under H₂ atmosphere,the LaBa₂V₃O₁₁ decomposed to LaVO₃ and BaYO₄ despite ofthe lower annealing temperature of 950℃.
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