Determinación cuantitativa de tantalio y niobio en minerales y óxidos por fluorescencia de Rayos X

Abstract

Minerals containing Tantalum and Niobium , and mixtures of Tantalum and Niobium are analyzed by X R ay Fluorescence for these elements. The samples are melted with Sodium Tetraborate into a bead, actording to a procedure described by F. Claisse, which com pletely corrects for matrix effects. With this method the plot of the line intensity, not corrected for background, as a fuction of concentration, is linear with precisión of about 6 % over the entire range bromoto 100 %. Puré spectrographic Tantalum and Niobium pentoxid es are used as primary comparison standard for minerals with quite different matrixes.