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Paper Titles
Preface
Optimizations of the Sintering Temperature to Reduce the Nd3RuO7 Phase and Investigations of their Effect on the Magnetic Properties in Nd2Ru2O7
p.3
Synthesis of Bismuth Ferrite and its Application for Oscillator Material up to 25 GHz Range
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The Effect of Partial Substitution of Non-Magnetic Impurity Zn on the Magnetic Moments of Eu1.88Ce0.12Cu1-yZnyO4+α-δ
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Evidence for Local Structural Distortion and Mixed States of Fe in β-NaFeO2: A Bond Valence Sum Analysis
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Refining Process and Identifying Content of Local Iron Sand
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Characteristics of Barium M-Hexaferrite with Doping Mn and Ni in X-Band Frequency for Microwave Absorption
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Initial Study of Magnetic Characterization of Barium Hexaferrite with the Addition of Cobalt Oxide Prepared by Powder Metallurgy Process
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Improvement of the Crystallinity of La2CuO4 Nanoparticles Using the Vacuum Treatment
p.44

Evidence for Local Structural Distortion and Mixed States of Fe in β-NaFeO2: A Bond Valence Sum Analysis

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Abstract:

We have analyzed the crystal structure, interatomic distances and bond valence sums in β-phase of sodium ferrite based on neutron diffraction measurement at room temperature. The Rietveld analysis performed using Pna21 space group obtains smaller lattice constants compared to the previous reports. This discrepancy is attributed to the sodium deficiency. We notice that the Na-O bonds are shortened, while Fe-O bonds are elongated. The calculated bond valence sum around the sodium and the iron ions are 1.08 and 2.64, respectively. This indicates the presence of Fe2+-Fe3+ mixed valence state.

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Periodical:

Materials Science Forum (Volume 1028)

Pages:

21-25

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1028.21

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Online since:

April 2021

Authors:

M.Y.P. Akbar, A. Insani, B. Prijamboedi, Agustinus Agung Nugroho*

Keywords:

Bond Valence Sum, Interatomic Angle, Interatomic Distance, Local Structural Distortion, Mixed States

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