Local structure examination of mineral-derived Fe2O3 powder by Fe K-edge EXAFS and XANES

H. Husain; B. Hariyanto; M. Sulthonul; P. Thamatkeng; S. Pratapa

doi:10.1088/1757-899X/367/1/012027

Local structure examination of mineral-derived Fe₂O₃ powder by Fe K-edge EXAFS and XANES

H. Husain, B. Hariyanto, M. Sulthonul, P. Thamatkeng, S. Pratapa

Research output: Contribution to journal › Conference article › peer-review

12 Citations (Scopus)

Abstract

Fe K-edge XANES (X-ray Absorption Near Edge Structure) and EXAFS (Extended X-ray Absorption Fine Structure) spectra have been used to investigate the local structures of hematite (Fe₂O₃) powders which were synthesized from local iron stone. The formation of hematite with various calcination temperature (500, 650, 800) °C was observed from XRD data of each powder, and Fe K-edge EXAFS and XANES were performed to sample with calcination temperature 800 °C. The XANES spectra confirmed the oxidation state of the powders. The energy position of the first pre-edge peak at (7113.5 ± 0.5) eV confirm Fe³⁺. The absorption edges of Fe₂O₃ powders was 7123.41 eV. The first EXAFS data analysis showed that Fe₂O₃ powder exhibited nearest-neighbor distances R_Fe-O = 1.56449 Å and R_Fe-Fe = 3.01449 Å. The XRD lattice parameter values for the sample is in a fair agreement with the nearest-neighbor distances according to the EXAFS data.

Original language	English
Article number	012027
Journal	IOP Conference Series: Materials Science and Engineering
Volume	367
Issue number	1
DOIs	https://doi.org/10.1088/1757-899X/367/1/012027
Publication status	Published - 12 Jun 2018
Event	5th International Conference on Advanced Materials Sciences and Technology, ICAMST 2017 - Makassar, Indonesia Duration: 19 Sept 2017 → 20 Sept 2017

Keywords

EXAFS
XANES
and FeO
iron stone mineral
local structure
oxidation state

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10.1088/1757-899X/367/1/012027

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title = "Local structure examination of mineral-derived Fe2O3 powder by Fe K-edge EXAFS and XANES",

abstract = "Fe K-edge XANES (X-ray Absorption Near Edge Structure) and EXAFS (Extended X-ray Absorption Fine Structure) spectra have been used to investigate the local structures of hematite (Fe2O3) powders which were synthesized from local iron stone. The formation of hematite with various calcination temperature (500, 650, 800) °C was observed from XRD data of each powder, and Fe K-edge EXAFS and XANES were performed to sample with calcination temperature 800 °C. The XANES spectra confirmed the oxidation state of the powders. The energy position of the first pre-edge peak at (7113.5 ± 0.5) eV confirm Fe3+. The absorption edges of Fe2O3 powders was 7123.41 eV. The first EXAFS data analysis showed that Fe2O3 powder exhibited nearest-neighbor distances RFe-O = 1.56449 {\AA} and RFe-Fe = 3.01449 {\AA}. The XRD lattice parameter values for the sample is in a fair agreement with the nearest-neighbor distances according to the EXAFS data.",

keywords = "EXAFS, XANES, and FeO, iron stone mineral, local structure, oxidation state",

author = "H. Husain and B. Hariyanto and M. Sulthonul and P. Thamatkeng and S. Pratapa",

note = "Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd.; 5th International Conference on Advanced Materials Sciences and Technology, ICAMST 2017 ; Conference date: 19-09-2017 Through 20-09-2017",

year = "2018",

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T1 - Local structure examination of mineral-derived Fe2O3 powder by Fe K-edge EXAFS and XANES

AU - Husain, H.

AU - Hariyanto, B.

AU - Sulthonul, M.

AU - Thamatkeng, P.

AU - Pratapa, S.

N1 - Publisher Copyright: © Published under licence by IOP Publishing Ltd.

PY - 2018/6/12

Y1 - 2018/6/12

N2 - Fe K-edge XANES (X-ray Absorption Near Edge Structure) and EXAFS (Extended X-ray Absorption Fine Structure) spectra have been used to investigate the local structures of hematite (Fe2O3) powders which were synthesized from local iron stone. The formation of hematite with various calcination temperature (500, 650, 800) °C was observed from XRD data of each powder, and Fe K-edge EXAFS and XANES were performed to sample with calcination temperature 800 °C. The XANES spectra confirmed the oxidation state of the powders. The energy position of the first pre-edge peak at (7113.5 ± 0.5) eV confirm Fe3+. The absorption edges of Fe2O3 powders was 7123.41 eV. The first EXAFS data analysis showed that Fe2O3 powder exhibited nearest-neighbor distances RFe-O = 1.56449 Å and RFe-Fe = 3.01449 Å. The XRD lattice parameter values for the sample is in a fair agreement with the nearest-neighbor distances according to the EXAFS data.

AB - Fe K-edge XANES (X-ray Absorption Near Edge Structure) and EXAFS (Extended X-ray Absorption Fine Structure) spectra have been used to investigate the local structures of hematite (Fe2O3) powders which were synthesized from local iron stone. The formation of hematite with various calcination temperature (500, 650, 800) °C was observed from XRD data of each powder, and Fe K-edge EXAFS and XANES were performed to sample with calcination temperature 800 °C. The XANES spectra confirmed the oxidation state of the powders. The energy position of the first pre-edge peak at (7113.5 ± 0.5) eV confirm Fe3+. The absorption edges of Fe2O3 powders was 7123.41 eV. The first EXAFS data analysis showed that Fe2O3 powder exhibited nearest-neighbor distances RFe-O = 1.56449 Å and RFe-Fe = 3.01449 Å. The XRD lattice parameter values for the sample is in a fair agreement with the nearest-neighbor distances according to the EXAFS data.

KW - EXAFS

KW - XANES

KW - and FeO

KW - iron stone mineral

KW - local structure

KW - oxidation state

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U2 - 10.1088/1757-899X/367/1/012027

DO - 10.1088/1757-899X/367/1/012027

M3 - Conference article

AN - SCOPUS:85049378444

SN - 1757-8981

VL - 367

JO - IOP Conference Series: Materials Science and Engineering

JF - IOP Conference Series: Materials Science and Engineering

IS - 1

M1 - 012027

T2 - 5th International Conference on Advanced Materials Sciences and Technology, ICAMST 2017

Y2 - 19 September 2017 through 20 September 2017

ER -

Local structure examination of mineral-derived Fe₂O₃ powder by Fe K-edge EXAFS and XANES

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