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 (Mn1-i2+Ini3+)[Mni2+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 22GPa at room temperature. The bulk modulus B0 and its first pressure derivative B0' determined by the third-order Birch–Murnaghan equation of state are 139.8(4)GPa and 5.4(5), respectively.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
