Synthesis and thermal behavior of Fe3O2(BO4) oxoborate
| Autor: | Rimma S. Bubnova, A. G. Goncharov, Ya. P. Biryukov, Stanislav K. Filatov |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Diffraction Chemistry Analytical chemistry 02 engineering and technology Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Chemical reaction Thermal expansion Degree (temperature) Crystallography Octahedron 0103 physical sciences Mössbauer spectroscopy Materials Chemistry Ceramics and Composites 0210 nano-technology Anisotropy |
| Zdroj: | Glass Physics and Chemistry. 42:202-206 |
| ISSN: | 1608-313X 1087-6596 |
| DOI: | 10.1134/s1087659616020048 |
| Popis: | 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 Mossbauer 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink