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.
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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|Item Type:||Journal Article|
|Keywords:||hydrotalcite, brucite, Raman microscopy, carrboydite, hydrohonessite, takovite, mountkeithite|
|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 2005 John Wiley & Sons|
|Copyright Statement:||The definite version is available on publication at www3.interscience.wiley.com|
|Deposited On:||09 Dec 2005|
|Last Modified:||29 Feb 2012 23:14|
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