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A mössbauer investigation of non-bridging oxygens in Na2O-Fe2O3-B2O3 glasses

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Abstract

Mössbauer measurements of sodium borate glasses 4 Fe2O3· x Na2O· (96-x) B2O3 (x=6, 10, 15, 20, 25, 30) have been carried out. It was found that Fe3+ is present in both octahedral and tetrahedral sites, whereby the tetrahedral sites are preferred. In the range of Na2O contents higher than about 15 mol%, the isomer shifts and quadrupole splittings for Fe3+ decrease continuously with increasing Na2O concentration. These changes could be attributed to the formation of non-bridging oxygens (NBO) in the neighborhood of ferric ions. Increasing Na2O content thus gives rise to more NBO increasing the symmetry of the iron polyhedra.

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References

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Authors and Affiliations

  1. Department of Physics, Nanjing University, Nanjing, China

    Hsia Yuanfu, Liu Rongchuan & Wang Shuxin

  2. Department of Silicate Materials, Wuhan Institute for Building Materials, Wuhan, China

    Cheng Yibing, Li Xinju & Xu Chao

Authors
  1. Hsia Yuanfu
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  2. Liu Rongchuan
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  3. Wang Shuxin
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  4. Cheng Yibing
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  5. Li Xinju
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  6. Xu Chao
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Yuanfu, H., Rongchuan, L., Shuxin, W. et al. A mössbauer investigation of non-bridging oxygens in Na2O-Fe2O3-B2O3 glasses. Hyperfine Interact 27, 285–288 (1986). https://doi.org/10.1007/BF02354762

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  • DOI: https://doi.org/10.1007/BF02354762

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