Preparation and the crystal structure of ten-layer Ba5Fe4NiO13.5

H. Takizawa, H. Steinfink

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8 Citations (Scopus)


Ba5Fe4NiO13.5 (BaFe0.8Ni0.2O2.70) was synthesized by heating the mixed nitrates at 700°C for 72 h in air. The crystal structure has been analyzed by Rietveld analysis of the powder X-ray diffraction data. Ba5Fe4NiO13.5 has a hexagonal unit cell, space group P63/mmc with lattice parameters a = 5.7713(3) Å and c = 24.5812(16) Å. The structure is formed by the stacking of 10 close-packed BaO3 layers consisting of six hexagonal and four cubic sequences. This stacking creates trinuclear and binuclear face sharing octahedral units that are linked by corner sharing into a column approximately 24-Å high. The Ni ion preferentially occupies the central octahedral interstice of the trinuclear unit and the Fe ions occupy all the other sites. The interatomic distances and the result of a magnetic measurement are consistent with the presence of 50% high-spin Fe4+ 50% high-spin Fe3+, and low-spin Ni3+ states.

Original languageEnglish
Pages (from-to)133-137
Number of pages5
JournalJournal of Solid State Chemistry
Issue number1
Publication statusPublished - 1996 Jan 5

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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