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Compressibility and structural stability of spinel-type MnIn2O4

Bekheet, Maged F. and Dubrovinsky, Leonid and Gurlo, Aleksander (2015):
Compressibility and structural stability of spinel-type MnIn2O4.
In: Journal of Solid State Chemistry, Elsevier Science Publishing, pp. 301-308, 230, ISSN 00224596,
[Online-Edition: http://dx.doi.org/10.1016/j.jssc.2015.07.016],
[Article]

Abstract

Spinel-type MnIn2O4 materials are synthesized at 500 °C from an In3+–Mn3+ co-precipitate; the synthesis is based on the in situ reduction of Mn3+ to Mn2+ during calcination. The structure refinement of the powder X-ray diffraction data reveals that the degree of inversion i of the (View the MathML sourceMn1-i2+Ini3+)[View the MathML sourceMni2+In2-i3+]O4 spinel synthesized in the air and N2 is small (i=0.08) and increases to 0.30 for the spinel synthesized in Ar. The distribution of Mn cations over tetrahedral and octahedral sites is confirmed by X-ray absorption near-edge spectroscopy. As shown by the high-temperature in situ X-ray diffractometry, MnIn2O4 spinel is stable against oxidation in the air up to 550 °C. The in situ X-ray diffraction experiments in a diamond anvil cell reveal that MnIn2O4 is stable up to 22 GPa at room temperature. The bulk modulus B0 and its first pressure derivative View the MathML sourceB0' determined by the third-order Birch–Murnaghan equation of state are 139.8(4) GPa and 5.4(5), respectively.

Item Type: Article
Erschienen: 2015
Creators: Bekheet, Maged F. and Dubrovinsky, Leonid and Gurlo, Aleksander
Title: Compressibility and structural stability of spinel-type MnIn2O4
Language: English
Abstract:

Spinel-type MnIn2O4 materials are synthesized at 500 °C from an In3+–Mn3+ co-precipitate; the synthesis is based on the in situ reduction of Mn3+ to Mn2+ during calcination. The structure refinement of the powder X-ray diffraction data reveals that the degree of inversion i of the (View the MathML sourceMn1-i2+Ini3+)[View the MathML sourceMni2+In2-i3+]O4 spinel synthesized in the air and N2 is small (i=0.08) and increases to 0.30 for the spinel synthesized in Ar. The distribution of Mn cations over tetrahedral and octahedral sites is confirmed by X-ray absorption near-edge spectroscopy. As shown by the high-temperature in situ X-ray diffractometry, MnIn2O4 spinel is stable against oxidation in the air up to 550 °C. The in situ X-ray diffraction experiments in a diamond anvil cell reveal that MnIn2O4 is stable up to 22 GPa at room temperature. The bulk modulus B0 and its first pressure derivative View the MathML sourceB0' determined by the third-order Birch–Murnaghan equation of state are 139.8(4) GPa and 5.4(5), respectively.

Journal or Publication Title: Journal of Solid State Chemistry
Volume: 230
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Manganese indate, Spinel, In situ characterization, High pressure, Diamond anvil cell, Bulk modulus
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 08 Jan 2016 09:18
Official URL: http://dx.doi.org/10.1016/j.jssc.2015.07.016
Identification Number: doi:10.1016/j.jssc.2015.07.016
Funders: The financial support by the German Research Foundation DFG (Grant number GU 992/8-1) within the priority programme SPP 1236 are greatly acknowledged.
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