Abstract
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°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.
| Original language | English |
|---|---|
| Pages (from-to) | 521-525 |
| Number of pages | 5 |
| Journal | Journal of Materials Chemistry |
| Volume | 5 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Jan 1995 |
| Externally published | Yes |
Cite this
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23Na and 27Al NMR study of the products from carbonation of a Bayer liquor. / Bastow, Timothy J.; Dirken, Peter J.; Smith, Mark E.; Turney, Terence W.
In: Journal of Materials Chemistry, Vol. 5, No. 3, 01.01.1995, p. 521-525.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - 23Na and 27Al NMR study of the products from carbonation of a Bayer liquor
AU - Bastow, Timothy J.
AU - Dirken, Peter J.
AU - Smith, Mark E.
AU - Turney, Terence W.
PY - 1995/1/1
Y1 - 1995/1/1
N2 - 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°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.
AB - 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°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.
UR - http://www.scopus.com/inward/record.url?scp=3643105719&partnerID=8YFLogxK
U2 - 10.1039/jm9950500521
DO - 10.1039/jm9950500521
M3 - Article
VL - 5
SP - 521
EP - 525
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
SN - 0959-9428
IS - 3
ER -