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Synthesis and characterization of O3-Na₃LiFeSbO₆: a new honeycomb ordered layered oxide

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Abstract
  • A new compound Na3LiFeSbO6 has been synthesized by conventional solid state methods and investigated using X-ray diffraction, DC magnetic susceptibility, 57Fe Mössbauer spectroscopy and optical measurements. This compound crystallizes in a monoclinic unit cell and is related to a family of honeycomb ordered layered oxide materials where Na+ fills octahedral interlayer sites between Li1/3Fe1/3Sb1/3O2 slabs of edge sharing octahedra. Each SbO6 octahedron is surrounded by LiO6 and FeO6 octahedra creating a honeycomb arrangement within the slabs. Powder X-ray diffraction indicates the presence of stacking faults. This compound exhibits Curie-Weiss behavior at high temperatures and the effective magnetic moment verifies the presence of high spin Fe3+. The 57Fe Mössbauer spectroscopy confirms Fe3+ in an octahedral position and indicates disorder in the arrangement of LiO6 and FeO6 octahedra in the Li1/3Fe1/3Sb1/3O2 slabs.
  • Keywords: Magnetic properties, Layered compounds, X-ray Diffraction, Optical properties, Mössbauer Spectroscopy
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  • Schmidt, W., Berthelot, R., Etienne, L., Wattiaux, A., & Subramanian, M. A. (2014). Synthesis and characterization of O3-Na₃LiFeSbO₆: A new honeycomb ordered layered oxide. Materials Research Bulletin, 50, 292-296. doi:10.1016/j.materresbull.2013.10.049
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  • 50
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  • This work has been supported by NSF grant DMR 0804167.
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