Examination of Natural and Standard Fe3O4 Powders Using X-Ray Absorption Near-Edge Spectroscopy (XANES)

Hariyanto Budi; Husain Husain; Lapboonruang Supanun; Pratapa Suminar

doi:10.4028/www.scientific.net/MSF.964.40

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HomeMaterials Science ForumMaterials Science Forum Vol. 964Examination of Natural and Standard Fe3O4 Powders...

Examination of Natural and Standard Fe₃O₄ Powders Using X-Ray Absorption Near-Edge Spectroscopy (XANES)

Abstract:

Investigation of Fe K-edge X-Ray Absorption Near Edge Spectroscopy (XANES) spectra of Fe₃O₄ (FeO.Fe₂O₃) from natural source compared with the Fe₃O₄ standard is presented. The natural Fe₃O₄ powder was prepared from ironstone of Tanah Laut, Kalimantan Selatan by co-precipitation method. XANES measurements in transmission mode were performed at the Synchrotron Light Research Institute (SLRI), Nakhon Ratchasima, Thailand. XRD phase analysis confirms that the synthesized Fe₃O₄ powder is a single phase, but it cannot determine the proportion of Fe₂O₃ and FeO in the structure. TEM measurement confirms that the particle size of natural Fe₃O₄ about 10 nm. Qualitative analysis of the pre-edge XANES data revealed that the absorbing atom in the XAS measurement is Fe³⁺. Meanwhile, the absorption edge (E₀) values of natural and standard Fe₃O₄ powders were 7126.44 eV and 7125.02 eV, respectively. The proportion was then acquired using XANES data analysis through Linear Combination Fitting (LCF). It was found that the natural Fe₃O₄ sample consisted of 98 wt. % Fe₂O₃ and 2 wt.% FeO, while the standard Fe₃O₄ powder consisted of 96 wt. % Fe₂O₃ and 4 wt. % FeO. The mechanism of the absorption in both samples is also described and compared.

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Materials Science Forum (Volume 964)

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40-44

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https://doi.org/10.4028/www.scientific.net/MSF.964.40

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Online since:

July 2019

Authors:

Hariyanto Budi, Husain Husain, Lapboonruang Supanun, Pratapa Suminar*

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Absorption Mechanism, Fe₃O₄ Powder, Fe₃O₄Standard, XANES

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