Synthesis and characterization of perovskite-type CaPbO3

Ayako Yamamoto, Nellie Khasanova, Xiao Jing Wu, Keiichi Tanabe

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have synthesized a new perovskite-type compound with nominal composition CaPbO3 under about 6 GPa using a cubic-anvil-type apparatus from a mixed powder of high-purity CaO and PbO2. The XRD pattern was indexed on the basis of an orthorhombic unit cell with a = 5.667(1) Å, b = 5.879(1) Å and c = 8.147(2) Å. This compound has a distorted perovskite-type structure, while two previously reported types of CaPbO3 have a fluorite-type structure and an ilmenate-type structure. EDX analysis and the unit cell parameters suggest a deficiency in the Ca site. The electrical resistivity of this compound at room temperature was very high ( > 105 Ω cm) in contrast to the metallic and semiconducting conductivity of BaPbO3 and SrPbO3, respectively.

Original languageEnglish
Pages (from-to)333-336
Number of pages4
JournalSolid State Ionics
Volume108
Issue number1-4
DOIs
Publication statusPublished - 1998 May 1

Keywords

  • Ca-Pb-O
  • Crystal structure
  • High-pressure synthesis

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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