Preparation of perovskite-type oxides by the thermal decomposition of heteronuclear complexes, Ln[FexCo1-x(CN)6]·4H 2O(Ln=Pr-Yb)

Masatomi Sakamoto*, Patrizia Nunziante, Enrico Traversa, Shigenori Matsushima, Masanari Miwa, Hiromichi Aono, Yoshihiko Sadaoka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Heteronuclear complexes of Ln[FexCo1-x(CN)6]·4H 2O(Ln=Pr-Yb) were synthesized and their thermal decomposition products were investigated. Thermal decomposition of the complexes results in the formation of perovskite-type oxides for Ln=Pr-Gd even at 800°C. The lattice parameters, a-, b- and c-lattice constants (crystal system: orthorhombic) increase linearly with the ratio of Fe/Co for the perovskite-type oxide. For Ln=Dy through Yb, the Ln2O3 phase is observed as the major product for x=0, but its content decreased with an increase in the Fe content; however, a single phase of the perovskite-type oxide was not formed for x=1. The perovskite-type structure for the Fe systems is easier to form compared with the Co systems. We clarified that the formation of the perovskite-type oxide is mainly affected by the ionic radius of the Ln3+ ion and the T3+ ion (T = Fe or Co).

Original languageEnglish (US)
Pages (from-to)963-969
Number of pages7
JournalJournal of the Ceramic Society of Japan
Issue number11
StatePublished - Nov 1997


  • Heteronuclear complexes
  • Hexacyano complexes
  • LnCoO
  • LnFeO
  • Perovskite-type oxides
  • Rare-earth cobalticyanides
  • Rare-earth ferricyanides
  • Thermal decomposition

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


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