Standard

Hydrothermal synthesis, phase formation and crystal chemistry of the pyrochlore/Bi2WO6 and pyrochlore/α–Fe2O3 composites in the Bi2O3–Fe2O3–WO3 system. / Lomakin, M. S.; Proskurina, O. V.; Danilovich, D. P.; Panchuk, V. V.; Semenov, V. G.; Gusarov, V. V.

In: Journal of Solid State Chemistry, Vol. 282, 121064, 02.2020.

Research output: Contribution to journal › Article › peer-review

Harvard

Lomakin, MS, Proskurina, OV, Danilovich, DP, Panchuk, VV, Semenov, VG & Gusarov, VV 2020, 'Hydrothermal synthesis, phase formation and crystal chemistry of the pyrochlore/Bi2WO6 and pyrochlore/α–Fe2O3 composites in the Bi2O3–Fe2O3–WO3 system', Journal of Solid State Chemistry, vol. 282, 121064. https://doi.org/10.1016/j.jssc.2019.121064

APA

Lomakin, M. S., Proskurina, O. V., Danilovich, D. P., Panchuk, V. V., Semenov, V. G., & Gusarov, V. V. (2020). Hydrothermal synthesis, phase formation and crystal chemistry of the pyrochlore/Bi2WO6 and pyrochlore/α–Fe2O3 composites in the Bi2O3–Fe2O3–WO3 system. Journal of Solid State Chemistry, 282, [121064]. https://doi.org/10.1016/j.jssc.2019.121064

Vancouver

Lomakin MS, Proskurina OV, Danilovich DP, Panchuk VV, Semenov VG, Gusarov VV. Hydrothermal synthesis, phase formation and crystal chemistry of the pyrochlore/Bi2WO6 and pyrochlore/α–Fe2O3 composites in the Bi2O3–Fe2O3–WO3 system. Journal of Solid State Chemistry. 2020 Feb;282. 121064. https://doi.org/10.1016/j.jssc.2019.121064

Author

Lomakin, M. S. ; Proskurina, O. V. ; Danilovich, D. P. ; Panchuk, V. V. ; Semenov, V. G. ; Gusarov, V. V. / Hydrothermal synthesis, phase formation and crystal chemistry of the pyrochlore/Bi2WO6 and pyrochlore/α–Fe2O3 composites in the Bi2O3–Fe2O3–WO3 system. In: Journal of Solid State Chemistry. 2020 ; Vol. 282.

BibTeX

@article{996e88d7b25a4d30b28160960a36ba9d,
title = "Hydrothermal synthesis, phase formation and crystal chemistry of the pyrochlore/Bi2WO6 and pyrochlore/α–Fe2O3 composites in the Bi2O3–Fe2O3–WO3 system",
abstract = "The present study was devoted to the investigation of the influence of the Bi/Fe ratio in precursors on the formation of heterogeneous systems with the pyrochlore composition Biy+0.67δFeyW2-yO6O'δ (hereinafter BFWO)/Bi2WO6, and BFWO/α-Fe2O3 under hydrothermal conditions at 200°С in a nitric acid solution within 6 h. It was shown that at the Bi/Fe ratios of ~1–9, the two coexisting phases are bismuth tungstate (Bi2WO6) with the crystallite size of about 7 nm, and BFWO with the crystallite size of about 30 nm, while at the Bi/Fe ratios of ~0.05–0.33, the coexisting phases are BFWO with the crystallite size of about 40 nm, α-Fe2O3 and the X-ray amorphous Fe2O3. According to the M{\"o}ssbauer spectroscopy data, the position of iron in BFWO is described by two doublets with similar chemical shifts, which indicates the inhomogeneous distribution of iron in the tungsten sublattice. The results of the local energy dispersive X-ray microanalysis (EDXMA), in combination with the data on the BFWO structure refined by the Rietveld method, as well as the TEM microstructure data, have shown the obtaining of a new pyrochlore structure, that is, BFWO, which forms within a wide range of compositions. In accordance with the refined data on the BFWO structure, it was demonstrated that this phase has the displacively disordered pyrochlore structure, in which bismuth atoms occupy the 96g Wyckoff position (WP).",
keywords = "Crystal structure determination, Crystallite size, Hydrothermal synthesis, M{\"o}ssbauer spectroscopy, Powder X-ray diffraction, Pyrochlore, PROPERTY, OPTICAL-PROPERTIES, BI2WO6, MAGNESIUM, CONDUCTIVITY, DIELECTRIC-PROPERTIES, Mossbauer spectroscopy, NANOCRYSTALLITES, MAGNETIC-PROPERTIES, MOSSBAUER, FE",
author = "Lomakin, {M. S.} and Proskurina, {O. V.} and Danilovich, {D. P.} and Panchuk, {V. V.} and Semenov, {V. G.} and Gusarov, {V. V.}",
year = "2020",
month = feb,
doi = "10.1016/j.jssc.2019.121064",
language = "English",
volume = "282",
journal = "Journal of Solid State Chemistry",
issn = "0022-4596",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Hydrothermal synthesis, phase formation and crystal chemistry of the pyrochlore/Bi2WO6 and pyrochlore/α–Fe2O3 composites in the Bi2O3–Fe2O3–WO3 system

AU - Lomakin, M. S.

AU - Proskurina, O. V.

AU - Danilovich, D. P.

AU - Panchuk, V. V.

AU - Semenov, V. G.

AU - Gusarov, V. V.

PY - 2020/2

Y1 - 2020/2

N2 - The present study was devoted to the investigation of the influence of the Bi/Fe ratio in precursors on the formation of heterogeneous systems with the pyrochlore composition Biy+0.67δFeyW2-yO6O'δ (hereinafter BFWO)/Bi2WO6, and BFWO/α-Fe2O3 under hydrothermal conditions at 200°С in a nitric acid solution within 6 h. It was shown that at the Bi/Fe ratios of ~1–9, the two coexisting phases are bismuth tungstate (Bi2WO6) with the crystallite size of about 7 nm, and BFWO with the crystallite size of about 30 nm, while at the Bi/Fe ratios of ~0.05–0.33, the coexisting phases are BFWO with the crystallite size of about 40 nm, α-Fe2O3 and the X-ray amorphous Fe2O3. According to the Mössbauer spectroscopy data, the position of iron in BFWO is described by two doublets with similar chemical shifts, which indicates the inhomogeneous distribution of iron in the tungsten sublattice. The results of the local energy dispersive X-ray microanalysis (EDXMA), in combination with the data on the BFWO structure refined by the Rietveld method, as well as the TEM microstructure data, have shown the obtaining of a new pyrochlore structure, that is, BFWO, which forms within a wide range of compositions. In accordance with the refined data on the BFWO structure, it was demonstrated that this phase has the displacively disordered pyrochlore structure, in which bismuth atoms occupy the 96g Wyckoff position (WP).

AB - The present study was devoted to the investigation of the influence of the Bi/Fe ratio in precursors on the formation of heterogeneous systems with the pyrochlore composition Biy+0.67δFeyW2-yO6O'δ (hereinafter BFWO)/Bi2WO6, and BFWO/α-Fe2O3 under hydrothermal conditions at 200°С in a nitric acid solution within 6 h. It was shown that at the Bi/Fe ratios of ~1–9, the two coexisting phases are bismuth tungstate (Bi2WO6) with the crystallite size of about 7 nm, and BFWO with the crystallite size of about 30 nm, while at the Bi/Fe ratios of ~0.05–0.33, the coexisting phases are BFWO with the crystallite size of about 40 nm, α-Fe2O3 and the X-ray amorphous Fe2O3. According to the Mössbauer spectroscopy data, the position of iron in BFWO is described by two doublets with similar chemical shifts, which indicates the inhomogeneous distribution of iron in the tungsten sublattice. The results of the local energy dispersive X-ray microanalysis (EDXMA), in combination with the data on the BFWO structure refined by the Rietveld method, as well as the TEM microstructure data, have shown the obtaining of a new pyrochlore structure, that is, BFWO, which forms within a wide range of compositions. In accordance with the refined data on the BFWO structure, it was demonstrated that this phase has the displacively disordered pyrochlore structure, in which bismuth atoms occupy the 96g Wyckoff position (WP).

KW - Crystal structure determination

KW - Crystallite size

KW - Hydrothermal synthesis

KW - Mössbauer spectroscopy

KW - Powder X-ray diffraction

KW - Pyrochlore

KW - PROPERTY

KW - OPTICAL-PROPERTIES

KW - BI2WO6

KW - MAGNESIUM

KW - CONDUCTIVITY

KW - DIELECTRIC-PROPERTIES

KW - Mossbauer spectroscopy

KW - NANOCRYSTALLITES

KW - MAGNETIC-PROPERTIES

KW - MOSSBAUER

KW - FE

UR - http://www.scopus.com/inward/record.url?scp=85078253835&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/94365c32-c9c0-3016-9d27-8ab62b5a74f8/

U2 - 10.1016/j.jssc.2019.121064

DO - 10.1016/j.jssc.2019.121064

M3 - Article

AN - SCOPUS:85078253835

VL - 282

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

SN - 0022-4596

M1 - 121064

ER -

ID: 51662028