Cheung, Philip C.W., Williams, Daryl R., Barrett, Jack, Barker, James and Kirk, Donald W. (2021) On the origins of some spectroscopic properties of "purple iron" (the tetraoxoferrate(VI) ion) and its Pourbaix safe-space. Molecules, 26(17), p. 5266. ISSN (online) 1420-3049
Abstract
In this work, the authors attempt to interpret the visible, infrared and Raman spectra of ferrate(VI) by means of theoretical physical-inorganic chemistry and historical highlights in this field of interest. In addition, the sacrificial decomposition of ferrate(VI) during water treatment will also be discussed together with a brief mention of how Rayleigh scattering caused by the decomposition of FeVIO42− may render absorbance readings erroneous. This work is not a compendium of all the instrumental methods of analysis which have been deployed to identify ferrate(VI) or to study its plethora of reactions, but mention will be made of the relevant techniques (e.g., Mössbauer Spectroscopy amongst others) which support and advance this overall discourse at appropriate junctures, without undue elaboration on the foundational physics of these techniques.
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