Stability of High-Spin State of Iron in β-NaFeO₂

Abstract:

We investigated the stability of the high-spin state of the iron β-NaFeO₂ based on the structural refinement. The oxidation of the Fe²⁺ ion in the as-synthesized sample is evidenced by its green color. Due to its sensitivity in air and CO₂, this compound will decompose into a reddish Fe³⁺ state. The smaller crystal volume of the decomposed compound is mainly related to the shorter ionic radius of the high-spin state Fe³⁺ and this result will be compared to the single crystal sample. In contrast to the polycrystalline sample, the decomposition single crystal sample only taking place on the surface of the as-grown crystal.

• Periodical: Key Engineering Materials (Volume 855)
• Pages: 177-182
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.855.177
• Online since: July 2020
• Authors: Mochammad Yan Pandu Akbar, Rieko Ishii, Agustinus Agung Nugroho*
• Keywords: Crystal Volume, Ionic Radius, Oxidation State, Spin State, β-NaFeO₂

References

[1] Y. Takeda, J. Akagi, A. Edagawa, M. Inagaki and S. Naka, A preparation and polymorphic relations of sodium iron oxide (NaFeO2),, Materials Research Bulletin, 15 (1980) 1167-1172.

DOI: 10.1016/0025-5408(80)90081-1

[2] N. Terada, D. D. Khalyavin, J. M. Perez-Mato, P. Manuel, D. Prabhakaran, A. Daoud-Aladine, P. G. Radaelli, H. S. Suzuki and H. Kitazawa, Magnetic and ferroelectric orderings in multiferroic α-NaFeO2,, Physical Review B, 89 (2014) 184424.

DOI: 10.1103/physrevb.89.184421

[3] M. Viret, D. Rubi, D. Colson, D. Lebeugle, A. Forget, P. Bonville, G. Dhalenne, R. Saint-Martin, G. Andre and F. Ott, β-NaFeO2, a new room-temperature multiferroic material,, Materials Research Bulletin, 47 (2012) 2294-2298.

DOI: 10.1016/j.materresbull.2012.05.040

[4] H. Watanabe and M. Fukase, Weak ferromagnetism in β-NaFeO2,, Journal of the Physical Society of Japan 6, 16 (1961) 1181-1184.

[5] B. H. Toby and R. B. V. Dreele, GSAS-II: the genesis of a modern open-source all purpose crystallography software package,, Journal of Applied Crystallography 46 (2013) 544-549.

DOI: 10.1107/s0021889813003531

[6] K. Momma and F. Izumi, VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data,, Journal of Applied Chrystallography 44 (2011) 1272-1276.

DOI: 10.1107/s0021889811038970

[7] Jain, S. P. Ong, G. Hautier, W. CHen, W. D. Richards, S. Dacek, S. Cholia, D. Gunter, D. Skinner, G. Ceder and K. A. Persson, The materials project: a materials genome approach to accelerating materials innovation,, Applied Physics Letters Materials 1 (2013) 1.

DOI: 10.1063/1.4812323

[8] Yanase, S. Onozawa, K. Ogaswara and H. Kobayashi, A novel application of α- and β-sodium ferrite as a CO2-capturing solid in air with water vapor,, Journal of CO2 Utilization 24 (2018) 200-209.

DOI: 10.1016/j.jcou.2017.11.016

[9] R. D. Shannon, Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides,, Acta Crystallography, vol. A 32 (1976) 751-767.

DOI: 10.1107/s0567739476001551

[10] M. Y. P. Akbar, R. Ishii, A. A. Nugroho, in preparation to publish.