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Synchrotron x‐ray fluorescence analysis of heavy trace elements in light silicate minerals
Author(s) -
Figueiredo M. O.,
Basto M. J.,
Abbas K.,
Chevallier P.,
Melo Z.,
Ramos M. T.
Publication year - 1993
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300220414
Subject(s) - synchrotron , x ray fluorescence , silicate , trace (psycholinguistics) , fluorescence , radiochemistry , synchrotron radiation , materials science , x ray , mineralogy , chemistry , analytical chemistry (journal) , optics , environmental chemistry , physics , linguistics , philosophy , organic chemistry
A description is presented of fluorescence spectrometric experiments using synchrotron radiation and an energydispersive detection system performed at the LURE (DCI storage ring) where a study of geological materials is under development. Early results obtained for natural lithium aluminosilicates (lepidolites) from pegmatite formations in northern Portugal are discused. Data handling and processing (deconvolution of the complex spectral lines, deduction of continuous background and peak area calculation) are briefly described. Some heavy trace elements previously unreported for these lepidolites (TI, W, Ta, Nb) and one geochemically relevant sub‐trace metal (Au) were detected. The analytical efficiencies of three excitation energies (6, 13 and 19 keV) are compared. The difficulities and drawbacks versus advantages of this techique for the assessment of trace and sub‐trace elements in geological samples are discussed.