| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1236260 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2011 | 4 Pages |
In this investigation, Raman spectroscopy with 1064 and 632.8 nm excitation was used to investigate real mineral samples of bauxite ore from mines of Northern Brazil, together with Raman mapping and X-rays diffraction. The obtained results show clearly that the use of microRaman spectroscopy is a powerful tool for the identification of all the minerals usually found in bauxites: gibbsite, kaolinite, goethite, hematite, anatase and quartz. Bulk samples can also be analysed, and FT-Raman is more adequate due to better signal-to-noise ratio and representativity, although not efficient for kaolinite. The identification of fingerprinting vibrations for all the minerals allows the acquisition of Raman-based chemical maps, potentially powerful tools for process mineralogy applied to bauxite ores.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Application of Raman spectroscopy to assess bauxite mineralogy on real ore samples. ► Diagnostic Raman vibrations can be obtained using 1064 or 632.8 nm wavelenghts. ► Use of microRaman spectroscopy for mineralidentification in bulk samples. ► Simultaneous phase identification in bulk samples is better using FT-Raman (1064 nm). ► Raman-based chemical maps are potentially a powerful tool for process mineralogy.
