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Raman spectroscopy of some natural hydrotalcites with sulphate and carbonate in the interlayer

Frost, Ray L., Weier, Matt L., & Kloprogge, J. Theo (2003) Raman spectroscopy of some natural hydrotalcites with sulphate and carbonate in the interlayer. Journal of Raman Spectroscopy, 34(10), pp. 760-768.

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Abstract

The structures of a series of nickel and magnesium based hydrotalcites have been explored using Raman microscopy. These natural hydrotalcites are based upon sulphate or carbonate being the counter anion in the interlayer. Variation in the position of the sulphate stretching vibrations occurs and is mineral dependent. Raman spectroscopy shows a reduction in the symmetry of both sulphate and carbonate, which leads to the conclusion that the anions are bonded to the brucite-like hydroxyl surface and to the water in the interlayer. Water bending modes are identified in both the Raman and infrared spectra at positions greater than 1630 cm-1, indicating the water is strongly hydrogen bonded to both the interlayer anions and the hydrotalcite surface.

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496 since deposited on 01 Apr 2005
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ID Code: 949
Item Type: Journal Article
Keywords: hydrotalcite, brucite, Raman microscopy, carrboydite, hydrohonessite, takovite, mountkeithite
DOI: 10.1002/jrs.1050
ISSN: 0377-0486
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 2003 John Wiley & Sons
Copyright Statement: The definite version is available on publication at www3.interscience.wiley.com
Deposited On: 01 Apr 2005
Last Modified: 29 Feb 2012 22:59

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