Wavelength-dispersive x-ray fluorescence spectrometric determination of tantalum in columbite-tantalite using TaKα and an LiF 420 analysing crystal |
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| Authors: | S Viswanathan Anjan Chaki Yamuna Singh |
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| Institution: | 1.Atomic Minerals Directorate for Exploration and Research,Begumpet, Hyderabad,India |
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| Abstract: | The paper proposes a simple, accurate, precise, and rapid method for determining the high atomic number (Z) major-element,
tantalum (Z = 73), in the rare mineral, columbite (Fe,Mn) (Nb,Ta)2O6] — tantalite (Fe,Mn) (Ta,Nb)2O6], by wavelength-dispersive x-ray fluorescence spectrometry (WDXRFS). The other major-element in columbite-tantalite is the
lower atomic number niobium (Z = 41). The method uses the characteristic radiation, TaKα, and an LiF 420 analysing crystal,
to overcome the problems associated with the serious x-ray spectral-line interference of the secondorder NbKα and NbKβ with
the first-order TaLα1 and TaLβ1 respectively. |
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