Standard

Temperature-induced iron oxidation in bafertisite Ba2Fe 42+ Ti2(Si2O7)2O2(OH)2F2 : X-ray diffraction and Mössbauer spectroscopy study. / Zhitova, Elena S.; Золотарев, Андрей; Krivovichev, Sergey V.; Goncharov, Alexey G.; Gabdrakhmanova, Faina A.; Vladykin, Nikolay V.; Krzhizhanovskaya, Maria G.; Shilovskikh, Vladimir V.; Vlasenko, Natalia S.; Zolotarev, Anatoly A.

In: Hyperfine Interactions, Vol. 238, No. 1, 96, 01.11.2017.

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

Harvard

Zhitova, ES, Золотарев, А, Krivovichev, SV, Goncharov, AG, Gabdrakhmanova, FA, Vladykin, NV, Krzhizhanovskaya, MG, Shilovskikh, VV, Vlasenko, NS & Zolotarev, AA 2017, 'Temperature-induced iron oxidation in bafertisite Ba2Fe 42+ Ti2(Si2O7)2O2(OH)2F2: X-ray diffraction and Mössbauer spectroscopy study', Hyperfine Interactions, vol. 238, no. 1, 96. https://doi.org/10.1007/s10751-017-1468-9

APA

Zhitova, E. S., Золотарев, А., Krivovichev, S. V., Goncharov, A. G., Gabdrakhmanova, F. A., Vladykin, N. V., Krzhizhanovskaya, M. G., Shilovskikh, V. V., Vlasenko, N. S., & Zolotarev, A. A. (2017). Temperature-induced iron oxidation in bafertisite Ba2Fe 42+ Ti2(Si2O7)2O2(OH)2F2: X-ray diffraction and Mössbauer spectroscopy study. Hyperfine Interactions, 238(1), [96]. https://doi.org/10.1007/s10751-017-1468-9

Vancouver

Zhitova ES, Золотарев А, Krivovichev SV, Goncharov AG, Gabdrakhmanova FA, Vladykin NV et al. Temperature-induced iron oxidation in bafertisite Ba2Fe 42+ Ti2(Si2O7)2O2(OH)2F2: X-ray diffraction and Mössbauer spectroscopy study. Hyperfine Interactions. 2017 Nov 1;238(1). 96. https://doi.org/10.1007/s10751-017-1468-9

Author

Zhitova, Elena S. ; Золотарев, Андрей ; Krivovichev, Sergey V. ; Goncharov, Alexey G. ; Gabdrakhmanova, Faina A. ; Vladykin, Nikolay V. ; Krzhizhanovskaya, Maria G. ; Shilovskikh, Vladimir V. ; Vlasenko, Natalia S. ; Zolotarev, Anatoly A. / Temperature-induced iron oxidation in bafertisite Ba2Fe 42+ Ti2(Si2O7)2O2(OH)2F2 : X-ray diffraction and Mössbauer spectroscopy study. In: Hyperfine Interactions. 2017 ; Vol. 238, No. 1.

BibTeX

@article{0aecb5dd36094ad18f9a6c2562eb9119,
title = "Temperature-induced iron oxidation in bafertisite Ba2Fe 42+ Ti2(Si2O7)2O2(OH)2F2: X-ray diffraction and M{\"o}ssbauer spectroscopy study",
abstract = "The high-temperature behavior of bafertisite was studied by combination of techniques in order to characterize the temperature-induced iron oxidation associated with deprotonation of an octahedral layer. The chemical formula of bafertisite from Darai-Pioz alkaline complex (Tajikistan) determined by electron-microprobe analyzes and M{\"o}ssbauer spectroscopy is Ba 2.11(Fe2.702+Fe0.173+Mn 1.09Zr 0.04Na 0.03) (Ti 1.96Nb 0.07)(Si 2O7)2O2(OH 1.29 O 0.65F0.06)F2. In situ high-temperature powder X-ray diffraction revealed abrupt shift of reflections to the high-angle region and reduction of their intensity at T > 525 ∘C. The M{\"o}ssbauer spectroscopy studies indicated that the crystal structure of bafertisite contains Fe in octahedral sites as predominantly ferric ions with Fe 3+/ ΣFe = 0.06, whereas bafertisite annealed at T = 600 ∘C has Fe in the same position with Fe 3+/ ΣFe up to 0.39. The differential scanning calorimetry and thermogravimetric analyzes reveal the occurrence of a broad exothermic effect at T ∼ 537 ∘C associated with the mass loss corresponding to deprotonation. Since in the studied sample of bafertisite, Fe 2+apfu strongly prevails over OH apfu, the stoichiometric (charged-balanced) high-temperature oxidized modification cannot be obtained. In the paper, the high-temperature behavior of bafertisite is discussed and compared to that of astrophyllite.",
keywords = "Bafertisite, Deprotonation, High-temperature crystal chemistry, Iron oxidation, Layered titanosilicates",
author = "Zhitova, {Elena S.} and Андрей Золотарев and Krivovichev, {Sergey V.} and Goncharov, {Alexey G.} and Gabdrakhmanova, {Faina A.} and Vladykin, {Nikolay V.} and Krzhizhanovskaya, {Maria G.} and Shilovskikh, {Vladimir V.} and Vlasenko, {Natalia S.} and Zolotarev, {Anatoly A.}",
year = "2017",
month = nov,
day = "1",
doi = "10.1007/s10751-017-1468-9",
language = "English",
volume = "238",
journal = "Hyperfine Interactions",
issn = "0304-3843",
publisher = "Springer Nature",
number = "1",

}

RIS

TY - JOUR

T1 - Temperature-induced iron oxidation in bafertisite Ba2Fe 42+ Ti2(Si2O7)2O2(OH)2F2

T2 - X-ray diffraction and Mössbauer spectroscopy study

AU - Zhitova, Elena S.

AU - Золотарев, Андрей

AU - Krivovichev, Sergey V.

AU - Goncharov, Alexey G.

AU - Gabdrakhmanova, Faina A.

AU - Vladykin, Nikolay V.

AU - Krzhizhanovskaya, Maria G.

AU - Shilovskikh, Vladimir V.

AU - Vlasenko, Natalia S.

AU - Zolotarev, Anatoly A.

PY - 2017/11/1

Y1 - 2017/11/1

N2 - The high-temperature behavior of bafertisite was studied by combination of techniques in order to characterize the temperature-induced iron oxidation associated with deprotonation of an octahedral layer. The chemical formula of bafertisite from Darai-Pioz alkaline complex (Tajikistan) determined by electron-microprobe analyzes and Mössbauer spectroscopy is Ba 2.11(Fe2.702+Fe0.173+Mn 1.09Zr 0.04Na 0.03) (Ti 1.96Nb 0.07)(Si 2O7)2O2(OH 1.29 O 0.65F0.06)F2. In situ high-temperature powder X-ray diffraction revealed abrupt shift of reflections to the high-angle region and reduction of their intensity at T > 525 ∘C. The Mössbauer spectroscopy studies indicated that the crystal structure of bafertisite contains Fe in octahedral sites as predominantly ferric ions with Fe 3+/ ΣFe = 0.06, whereas bafertisite annealed at T = 600 ∘C has Fe in the same position with Fe 3+/ ΣFe up to 0.39. The differential scanning calorimetry and thermogravimetric analyzes reveal the occurrence of a broad exothermic effect at T ∼ 537 ∘C associated with the mass loss corresponding to deprotonation. Since in the studied sample of bafertisite, Fe 2+apfu strongly prevails over OH apfu, the stoichiometric (charged-balanced) high-temperature oxidized modification cannot be obtained. In the paper, the high-temperature behavior of bafertisite is discussed and compared to that of astrophyllite.

AB - The high-temperature behavior of bafertisite was studied by combination of techniques in order to characterize the temperature-induced iron oxidation associated with deprotonation of an octahedral layer. The chemical formula of bafertisite from Darai-Pioz alkaline complex (Tajikistan) determined by electron-microprobe analyzes and Mössbauer spectroscopy is Ba 2.11(Fe2.702+Fe0.173+Mn 1.09Zr 0.04Na 0.03) (Ti 1.96Nb 0.07)(Si 2O7)2O2(OH 1.29 O 0.65F0.06)F2. In situ high-temperature powder X-ray diffraction revealed abrupt shift of reflections to the high-angle region and reduction of their intensity at T > 525 ∘C. The Mössbauer spectroscopy studies indicated that the crystal structure of bafertisite contains Fe in octahedral sites as predominantly ferric ions with Fe 3+/ ΣFe = 0.06, whereas bafertisite annealed at T = 600 ∘C has Fe in the same position with Fe 3+/ ΣFe up to 0.39. The differential scanning calorimetry and thermogravimetric analyzes reveal the occurrence of a broad exothermic effect at T ∼ 537 ∘C associated with the mass loss corresponding to deprotonation. Since in the studied sample of bafertisite, Fe 2+apfu strongly prevails over OH apfu, the stoichiometric (charged-balanced) high-temperature oxidized modification cannot be obtained. In the paper, the high-temperature behavior of bafertisite is discussed and compared to that of astrophyllite.

KW - Bafertisite

KW - Deprotonation

KW - High-temperature crystal chemistry

KW - Iron oxidation

KW - Layered titanosilicates

UR - http://www.scopus.com/inward/record.url?scp=85035197053&partnerID=8YFLogxK

U2 - 10.1007/s10751-017-1468-9

DO - 10.1007/s10751-017-1468-9

M3 - Article

AN - SCOPUS:85035197053

VL - 238

JO - Hyperfine Interactions

JF - Hyperfine Interactions

SN - 0304-3843

IS - 1

M1 - 96

ER -

ID: 10354419