CJCU

Chem. J. Chinese Universities ›› 2003, Vol. 24 ›› Issue (5): 753.

• Articles •     Next Articles

Structure Variation and Phase Relationship of the Hexagonal Perovskite System La2Ca2MnO7-Sm2Ca2MnO7

BIE Li-Jian1,2, LI Guo-Bao1, LIAO Fu-Hui1, LIN Jian-Hua1   

  1. 1. State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
    2. Department of Chemistry, Linyi Teachers' College, Linyi 276005, China
  • Received:2002-07-24 Online:2003-05-24 Published:2003-05-24

PDF (PC)

Abstract: La2-xSmxCa2MnO7samples were prepared from citric acid sol-gel precursor by using solid state reaction. The cell parameters of the sample were refined by using Rietveld method, which evidence the presence of single-phase regions(x≤0. 8 and x≥1. 0) and two-phase region 0.8<x<1. 0. The structure variation of the system can be understood by considering the ionic size of rare earth cation.

Key words: Hexagonal perovskite, Intergrowth compound, Manganate, Solid state chemistry

CLC Number: 

TrendMD: