Near infrared spectroscopy of natural alunites

Frost, Ray L. & Wain, Daria L. (2008) Near infrared spectroscopy of natural alunites. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 71(2), pp. 490-495.

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Near-infrared spectroscopy (NIR) has been used to analyse alunites of formula K(Al3+)6(SO4)4(OH)12. Whilst the spectra of the alunites show a common pattern differences in the spectra are observed which enable the minerals to be distinguished. These differences are attributed to subtle variations in alunite composition.
The NIR bands in the 6300 to 7000 cm-1 region are attributed to the first fundamental overtone of both the infrared and Raman hydroxyl stretching vibrations. A set of bands are observed in the 4700 to 5500 cm-1 region which are assigned to combination bands of the hydroxyl stretching and deformation vibrations. NIR spectroscopy has the ability to distinguish between the alunite minerals even when the formula of the minerals is closely related. The NIR spectroscopic technique has great potential as a mineral exploratory tool on planets and in particular Mars.

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6 citations in Web of Science®
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ID Code: 15385
Item Type: Journal Article
Refereed: Yes
Keywords: alunite, natro, alunite, ammonio, alunite, jarosite, Infrared and Near, infrared spectroscopy, sulphate
DOI: 10.1016/j.saa.2007.11.029
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2008 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 31 Oct 2008 00:00
Last Modified: 29 Feb 2012 13:49

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