Bastow, T.J. and Dirken, P.J. and Smith, M.E. and Turney, T.W. (1995) NA-23 and AL-27 NMR-Study of the Productions from Carbonation of a Bayer Liquor. Journal of Materials Chemistry, 5 (3). pp. 521-525. ISSN 0959-9428.
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A multinuclear magnetic resonance methodology combining magic angle spinning, cross-polarisation and double angle rotation has been used to characterise the product from the carbonation of a Bayer liquor as predominantly well ordered NaAlCO3(OH)(2) (dawsonite). The NMR spectra are dominated by resonances from this phase, but accurate simulation requires additional minor components, most likely a mixture of a poorly ordered aluminium hydroxide gel and an amorphous phase related to NaHCO3, which is not observed by X-ray diffraction. Thermal decomposition of dawsonite at 350 degrees C proceeds through partial loss of CO2 and OH with concomitant formation of disordered materials containing sodium species, four-, five- and six-fold coordinate Al sites, and two types of residual carbonate.
|Subjects:||Q Science > QD Chemistry|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Biosciences|
|Depositing User:||P. Ogbuji|
|Date Deposited:||08 Jun 2009 15:56|
|Last Modified:||04 May 2012 14:29|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/19690 (The current URI for this page, for reference purposes)|
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