Synthesis and thermal behavior of Fe3O2(BO4) oxoborate
Source abstract
Abstract
Iron oxoborate Fe 3 O 2 (BO 4 ) 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 Fe 3 O 2 (BO 4 ) begins decomposing with the formation of Fe 2 O 3 in the temperature range 660–900°C. Thermal expansion is sharply anisotropic at room temperature (α max /α min = 7) and becomes more isotropic with an increase in the temperature (α max /α min = 1.2). The degree of oxidation of Fe 3+ 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.
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Research context
OpenAlex topics: Crystal Structures and Properties · Nuclear materials and radiation effects · X-ray Diffraction in Crystallography
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References (11)
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