FORDER, S D, HANNANT, O M, BINGHAM, Paul and HAND, R J (2010). Concerning the use of standards for identifying coordination environments in glasses. Journal of Physics : Conference Series, 217, 012072.Full text not available from this repository.
It is an established methodology to use crystallographically well-defined standard materials for understanding site geometries in glasses. Here we discuss the benefits and the limitations of this approach for the investigation by Mössbauer and EXAFS of Fe2+ Fe3+ in aluminosilicate glasses. As a case study we specifically consider Fe2+ Fe3+ sites and whether these exist in our glasses; and if so, whether they have defined site geometries or occur simply as a consequence of the site distortions and Fe-O bond length distributions. Results are consistent with the existence of Fe2+ and Fe3+ but do not prove this because site distortion and a mixture of 4- and 6-coordinated sites can produce comparable results. This exemplifies the need for caution when interpreting glass data based on standards.
|Additional Information:||International Conference on the Applications of the Mössbauer Effect (ICAME 2009) 19–24 July 2009, Vienna, Austria|
|Research Institute, Centre or Group:||Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology|
|Depositing User:||Hilary Ridgway|
|Date Deposited:||07 Sep 2012 09:07|
|Last Modified:||07 Sep 2012 09:07|
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