The influence of redox state on the location of iron ions in the structure of silicate glass with high iron content

Publication date: 15 April 2020Source: Journal of Molecular Structure, Volume 1206Author(s): Anna ZawadaAbstractWith the help of Mössbauer investigations, it was found that tetrahedral coordination is present in the alkali silicate glass system for both Fe2+ and Fe3+ in oxidising molten glass. The reduction process changes the coordination number of iron from 4 to 6. It is clear that the iron content has a much stronger influence on the properties than the redox state. In lower temperatures, the difference between reducing and oxidising conditions can be clearly observed, which at high temperatures lies within the measurement error range. A change in the redox state has a significant influence on the transition temperature, density, microhardness, and on the expansion coefficient. Therefore, it can be concluded that after reduction, the iron ions in the structure play a similar role to that of network transducers.
Source: Journal of Molecular Structure - Category: Molecular Biology Source Type: research
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