%0 Conference Proceedings %T SEM and µ-Raman characterization of electron beam damages on fluor-apatites : Implication for EPMA analysis. %+ Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) %+ Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) %A Wille, Guillaume %A Di Carlo, Ida %A Lahfid, Abdeltif %< avec comité de lecture %B EMAS 2014 : 11th EMAS Regional Workshop on ELECTRON PROBE MICROANALYSIS OF MATERIALS TODAY - PRACTICAL ASPECTS %C Leoben, Austria %8 2014-09-21 %D 2014 %K EPMA %K apatite %K Raman %K irradiation damages %Z Sciences of the Universe [physics]/OtherConference papers %X Apatites are phosphate minerals of a general formula Ca5(PO4)3(OH,Cl,F). They are are the principal constituent of teeth and bone (natural and synthetic); represent an important accessory minerals in volcano geological environment by means as a storage of elements such as halogens, sulphates, carbonates, Sr and REE; represent a packaging of radionuclides for nuclear waste, trapping heavy metals and finally are mostly used fertilizers. This work is focused on fluorapatite, the Fluorine-rich composition. As mentioned by several authors, SEM and EPMA analysis of F-apatites is complicated by the strong consequences of electron beam damages. This problem is particularly strong for the determination of fluorine concentration. Indeed a complex intensity variation is observed for the fluorine signal collected by the spectrometer; this variation mainly depends on two parameters: crystal orientation of the mineral grain and electron beam setup. Crystallographically-oriented Fluor-apatite were irradiated under the EPMA electron beam, using different setup (i.e. acceleration voltage, beam current, beam size) following the F, Ca and P WDS-variations signal. Beam damages were characterized by SEM and µ-Raman (including Raman-in-SEM). %G English %Z ISTO %2 https://brgm.hal.science/hal-01011944/document %2 https://brgm.hal.science/hal-01011944/file/Wille_Di_Carlo_Abstract.pdf %L hal-01011944 %U https://brgm.hal.science/hal-01011944 %~ OBSPM %~ INSU %~ BRGM %~ CNRS %~ UNIV-ORLEANS %~ ISTO %~ OSUC %~ GIP-BE %~ PSL %~ OBSPM-PSL