Raman spectroscopy of hydrotalcites with sulphate, molybdate and chromate in the interlayer

Frost, Ray L., Musumeci, Anthony W., Martens, Wayde N., Adebajo, Moses O., & Bouzaid, Jocelyne (2005) Raman spectroscopy of hydrotalcites with sulphate, molybdate and chromate in the interlayer. Journal of Raman Spectroscopy, 36(10), pp. 925-931.

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Raman microscopy has been used to characterize the interlayer anions in synthesized hydrotalcites of formula Mg6Al2(OH)16(XO4).4H2O where X is S or Mo or Cr. The Raman spectroscopy shows that both the chromate and molybdate anions are not polymerised in the hydrotalcite interlayer. This lack of polymerisation is attributed to the effect of pH during synthesis. A model of bonding is proposed for the interlayer anions based upon the observation of two symmetric stretching modes and symmetry lowering of the chromate, molybdate and sulphate anions. Two types of anions are present hydrated and hydroxyl surface bonded.

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37 citations in Scopus
36 citations in Web of Science®
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ID Code: 2329
Item Type: Journal Article
Refereed: Yes
Keywords: hydrotalcite, brucite, Raman microscopy, carrboydite, hydrohonessite, takovite, mountkeithite
DOI: 10.1002/jrs.1385
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
Copyright Owner: Copyright 2005 John Wiley & Sons
Copyright Statement: The definite version is available on publication at www3.interscience.wiley.com
Deposited On: 09 Dec 2005 00:00
Last Modified: 29 Feb 2012 13:14

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