Synthesis and Thermal Behavior of Fe3O2(BO4) Oxoborate

Ya. P. Biryukov, R. S. Bubnova, S. K. Filatov, A. G. Goncharov

Research output

3 Citations (Scopus)

Abstract

Iron oxoborate Fe3O2(BO4) has been first produced in solid-phase chemical reactions. Its thermal behavior in the temperature range 20–900°C is studied with the use in situ high-temperature powder X-ray diffraction. It is shown that Fe3O2(BO4) begins decomposing with the formation of Fe2O3 in the temperature range 660–900°C. Thermal expansion is sharply anisotropic at room temperature (αmax/αmin = 7) and becomes more isotropic with an increase in the temperature (αmax/αmin = 1.2). The degree of oxidation of Fe3+ has been confirmed by Mössbauer spectroscopy (at a room temperature), and two nonequivalent positions in the structure have been detected, which are occupied by iron atoms with the octahedral environment of the oxygen atoms.
Original languageEnglish
Pages (from-to)202–206
JournalGlass Physics and Chemistry
Volume42
Issue number2
Publication statusPublished - 2016

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synthesis
iron
room temperature
Temperature
temperature
solid phases
thermal expansion
oxygen atoms
chemical reactions
Iron
Atoms
oxidation
diffraction
X ray powder diffraction
spectroscopy
Thermal expansion
atoms
Hot Temperature
Chemical reactions
x rays

Cite this

Biryukov, Ya. P. ; Bubnova, R. S. ; Filatov, S. K. ; Goncharov, A. G. / Synthesis and Thermal Behavior of Fe3O2(BO4) Oxoborate. In: Glass Physics and Chemistry. 2016 ; Vol. 42, No. 2. pp. 202–206.
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abstract = "Iron oxoborate Fe3O2(BO4) has been first produced in solid-phase chemical reactions. Its thermal behavior in the temperature range 20–900°C is studied with the use in situ high-temperature powder X-ray diffraction. It is shown that Fe3O2(BO4) begins decomposing with the formation of Fe2O3 in the temperature range 660–900°C. Thermal expansion is sharply anisotropic at room temperature (αmax/αmin = 7) and becomes more isotropic with an increase in the temperature (αmax/αmin = 1.2). The degree of oxidation of Fe3+ has been confirmed by M{\"o}ssbauer spectroscopy (at a room temperature), and two nonequivalent positions in the structure have been detected, which are occupied by iron atoms with the octahedral environment of the oxygen atoms.",
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Synthesis and Thermal Behavior of Fe3O2(BO4) Oxoborate. / Biryukov, Ya. P.; Bubnova, R. S.; Filatov, S. K.; Goncharov, A. G.

In: Glass Physics and Chemistry, Vol. 42, No. 2, 2016, p. 202–206.

Research output

TY - JOUR

T1 - Synthesis and Thermal Behavior of Fe3O2(BO4) Oxoborate

AU - Biryukov, Ya. P.

AU - Bubnova, R. S.

AU - Filatov, S. K.

AU - Goncharov, A. G.

PY - 2016

Y1 - 2016

N2 - Iron oxoborate Fe3O2(BO4) has been first produced in solid-phase chemical reactions. Its thermal behavior in the temperature range 20–900°C is studied with the use in situ high-temperature powder X-ray diffraction. It is shown that Fe3O2(BO4) begins decomposing with the formation of Fe2O3 in the temperature range 660–900°C. Thermal expansion is sharply anisotropic at room temperature (αmax/αmin = 7) and becomes more isotropic with an increase in the temperature (αmax/αmin = 1.2). The degree of oxidation of Fe3+ has been confirmed by Mössbauer spectroscopy (at a room temperature), and two nonequivalent positions in the structure have been detected, which are occupied by iron atoms with the octahedral environment of the oxygen atoms.

AB - Iron oxoborate Fe3O2(BO4) has been first produced in solid-phase chemical reactions. Its thermal behavior in the temperature range 20–900°C is studied with the use in situ high-temperature powder X-ray diffraction. It is shown that Fe3O2(BO4) begins decomposing with the formation of Fe2O3 in the temperature range 660–900°C. Thermal expansion is sharply anisotropic at room temperature (αmax/αmin = 7) and becomes more isotropic with an increase in the temperature (αmax/αmin = 1.2). The degree of oxidation of Fe3+ has been confirmed by Mössbauer spectroscopy (at a room temperature), and two nonequivalent positions in the structure have been detected, which are occupied by iron atoms with the octahedral environment of the oxygen atoms.

M3 - Article

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JF - Glass Physics and Chemistry

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