The Raman spectrum of the metastable Mn5O8 phase, obtained from slow oxidation of Mn3O4 at low temperature, is presented and analysed for the first time and the thermal stability is monitored by the changes in Raman spectra due to laser-induced thermal treatments. A structural transformation toward the spinel phase Mn3O4 is observed at temperature higher than 1000 K. Other Mn oxides, characterised by intermediate Mn oxidation states, are not detected below or during the transition. A compositional model of the sample grains is also proposed by comparing Raman data with X-ray diffraction and scanning electron microscopy measurements. (C) 1999 Elsevier Science Ltd. All rights reserved.

Azzoni, C., Mozzati, M., Galinetto, P., Paleari, A., Massarotti, V., Capsoni, D., et al. (1999). Thermal stability and structural transition of metastable Mn5O8: in situ micro-Raman study. SOLID STATE COMMUNICATIONS, 112(7), 375-378 [10.1016/S0038-1098(99)00368-3].

Thermal stability and structural transition of metastable Mn5O8: in situ micro-Raman study

PALEARI, ALBERTO MARIA FELICE;
1999

Abstract

The Raman spectrum of the metastable Mn5O8 phase, obtained from slow oxidation of Mn3O4 at low temperature, is presented and analysed for the first time and the thermal stability is monitored by the changes in Raman spectra due to laser-induced thermal treatments. A structural transformation toward the spinel phase Mn3O4 is observed at temperature higher than 1000 K. Other Mn oxides, characterised by intermediate Mn oxidation states, are not detected below or during the transition. A compositional model of the sample grains is also proposed by comparing Raman data with X-ray diffraction and scanning electron microscopy measurements. (C) 1999 Elsevier Science Ltd. All rights reserved.
Articolo in rivista - Articolo scientifico
X-ray scattering; phase transitions; inelastic light scattering
English
1999
112
7
375
378
none
Azzoni, C., Mozzati, M., Galinetto, P., Paleari, A., Massarotti, V., Capsoni, D., et al. (1999). Thermal stability and structural transition of metastable Mn5O8: in situ micro-Raman study. SOLID STATE COMMUNICATIONS, 112(7), 375-378 [10.1016/S0038-1098(99)00368-3].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/1416
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