The Structure of Gallium in Strongly Alkaline, Highly Concentrated Gallate Solutions—a Raman and 71Ga-NMR Spectroscopic Study

@article{Sipos2008TheSO,
  title={The Structure of Gallium in Strongly Alkaline, Highly Concentrated Gallate Solutions—a Raman and 71Ga-NMR Spectroscopic Study},
  author={P{\'a}l Sipos and T{\"u}nde Megyes and Ott{\'o} Berkesi},
  journal={Journal of Solution Chemistry},
  year={2008},
  volume={37},
  pages={1411-1418}
}
Highly concentrated alkaline gallate solutions with 0.23≤[Ga(III)]T≤2.32 mol⋅dm−3 and 1≤[NaOH]T≤15 mol⋅dm−3 have been prepared and investigated by Raman and 71Ga-NMR spectroscopy. Both the Raman and 71Ga-NMR spectra are consistent with the presence of only one Ga-bearing species in these solutions, the tetrahedral hydroxocomplex, Ga(OH)4−. Contact ion pairs were found to cause variations in the Raman and 71Ga-NMR parameters that are at the edge of detectability. Other species that have been… Expand
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References

SHOWING 1-10 OF 29 REFERENCES
Quantitative determination of an aluminate dimer in concentrated alkaline aluminate solutions by Raman spectroscopy.
TLDR
The (aquated) species Na(+), OH(-), Al(OH)(4)(-), the dimer, and their ion-pairs, were sufficient to interpret all the Raman observations and no evidence was found for various other species that have been claimed to exist in concentrated alkaline aluminate solutions. Expand
An X-ray absorption fine structure and nuclear magnetic resonance spectroscopy study of gallium–silica complexes in aqueous solution
Abstract The influence of aqueous silica on gallium(III) hydrolysis in dilute (2 × 10 −4 ≤ m Ga ≤ 5 × 10 −3 ) and moderately concentrated (0.02 ≤ m Ga ≤ 0.3) aqueous solutions was studied at ambientExpand
Comparison of the hydrolyses of gallium(III) and aluminium(III) solutions by nuclear magnetic resonance spectroscopy
A quantitative 71Ga n.m.r. study of the base hydrolysis of gallium(III) salt solutions has been undertaken. The resulting spectra were very similar to the 27Al n.m.r. spectra obtained for aluminiumExpand
(27)Al NMR and Raman spectroscopic studies of alkaline aluminate solutions with extremely high caustic content - Does the octahedral species Al(OH)(6)(3-) exist in solution?
TLDR
Variations in the (27)Al NMR and Raman spectra can be interpreted in terms of contact ion-pairs formed between the cation of the medium and the well-established Al(OH)(4)(-) or the dimeric aluminate species. Expand
Detection of a new polymeric species formed through the hydrolysis of gallium(III) salt solutions
A previously unreported gallium species has been detected which is formed by the hydrolysis of aqueous gallium(III) solutions. N.m.r. studies have shown that this species has a tetrahedrallyExpand
Multinuclear magnetic resonance studies of the hydrolysis of aluminium(III). Part 8. Base hydrolysis monitored at very high magnetic field
New studies of base-hydrolysed aluminium(III) solutions were made using high-field 1H and 27Al n.m.r. spectroscopy. The increased sensitivity of the modern equipment has allowed data to be obtainedExpand
Theoretical Investigation of the Nature of Aluminum-Containing Species Present in Alkaline Solution
The structure, energies, and infrared spectra of a range of possible monomeric and dimeric aluminum-containing neutral and anionic species that may be present in either dilute or concentratedExpand
Gallium speciation in aqueous solution. Experimental study and modelling: Part 2. Solubility of α-GaOOH in acidic solutions from 150 to 250°C and hydrolysis constants of gallium (III) to 300°C
Abstract The solubility of α-GaOOH was measured in low ionic strength (0.025 M) HClNaCl solutions over the pH range 1.6–4.1 at 150, 200, and 250°C. A least squares linear regression of these dataExpand
Metal Substitution in Keggin-Type Tridecameric Aluminum-Oxo-Hydroxy Clusters.
TLDR
Single-crystal XRD analysis of these two polyoxocations provides the first rigorous comparison between them and shows they have very similar structures and the greater thermal stability of GaAl12 cannot be rationalized in terms of the overall geometric considerations. Expand
Gallium recovery from Bayer's liquor using hydroxamic acid resin
Gallium, which is extensively used in the production of semiconductor materials, is present at the parts per million level in Bayer's liquor. The low concentration of gallium in the liquor, alongExpand
...
1
2
3
...