Abstract
The niobium and zirconium L III-absorption spectra in some niobates and zircons were obtained with a vacuum focusing crystal spectrometer. The effective charges of Nb and Zr in these minerals were derived from the X-ray absorption spectra. The fine structure of the absorption spectra and effective charges Nb and Zr in metamict, partly-metamict minerals and crystalline analogues made it possible to draw a conclusion as to the nature of the first coordination sphere of Nb and Zr during metamict decay and subsequent recrystallization under annealing of these minerals.
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Barinsky, R.L., Kulikova, I.M. Metamict transformations in some niobates and zircons according to X-ray absorption spectra. Phys Chem Minerals 1, 325–333 (1977). https://doi.org/10.1007/BF00308843
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DOI: https://doi.org/10.1007/BF00308843