Incorporation of oxygen to crystalline zeolitic chromosilicates, with oxidation of anchored CrIII to non-interacting CrVI species, has been confirmed by photoacoustic spectroscopy; the dichromate anion being extracted from the chromosilicate with water and identified by precipitation of AgCrO4 and oxidation to CrO5.
J. S. T. Mambrim, E. J. S. Vichi, H. O. Pastore, C. U. Davanzo, H. Vargas, E. Silva and O. Nakamura, J. Chem. Soc., Chem. Commun., 1991, 922 DOI: 10.1039/C39910000922
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