| Titre | Identifying pseudorutile and kleberite using Raman spectroscopy |
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| Auteur | Imperial, A; Pe-Piper, G; Piper, D J W ; Grey, I E |
| Source | Minerals vol. 12, issue 1210, 2022 p. 1-9, https://doi.org/10.3390/min12101210  Accès ouvert |
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| Année | 2022 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200003 |
| Éditeur | MDPI |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.3390/min12101210 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Région | South Australia; Indonesia |
| Sujets | spectroscopie; Bassin Néo-Écossais; minéralogie |
| Illustrations | diagrammes; tableaux; spectres |
| Diffusé | 2022 09 25 |
| Résumé | (disponible en anglais seulement)
Pseudorutile and kleberite are intermediate minerals formed during alteration of ilmenite to rutile. They are difficult to identify, as both have a range of
chemical composition and occur as small crystals commonly mixed with other minerals. Reference samples of large crystals of pseudorutile and kleberite, with published X-ray diffraction and chemical analyses, were analysed to establish characteristic
Raman spectra. Pseudorutile produced a goethite-like Raman spectrum but with a shift to increased wavenumber. It has characteristic Raman bands with peak positions at 234, 302, 402, 546, 617, 713 and 816 cm-1 and OH stretching over the interval of
3390-3350 cm-1. The 402 and 806 cm-1 bands are the most intense. Kleberite produced a similar spectrum, but with a 10-30 cm-1 greater Raman shift in the goethite-like bands. Its Raman bands have peak positions at 432, 573, 740, and 820 cm-1 and OH
stretching at 3390-3350 cm-1. These results were applied to identify pseudorutile formed by diagenetic alteration of detrital ilmenite in Cretaceous sandstones of the Mesozoic Scotian Basin, eastern Canada. These samples showed pseudorutile Raman
bands, but some samples are intermixed with residual ilmenite. Raman microspectroscopy thus allows rapid identification of small grains of pseudorutile and kleberite. |
| Sommaire | (Résumé en langage clair et simple, non publié)
L'étude décrit une nouvelle méthode utilisant la spectroscopie Raman pour identifier le pseudorutile et la kleberite, deux minéraux formés par
l'altération de l'ilménite, un minéral titanifère courant, qui pourraient être utiles pour suivre la migration du pétrole. |
| GEOSCAN ID | 323643 |
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