Indium(III) hydroxide
| Indium(III) hydroxide | ||
|---|---|---|
| IUPAC name Indium(III) hydroxide | ||
| Other names Indium hydroxide, indium trihydroxide | ||
| Identifiers | ||
| CAS number | 20661-21-6 | |
| PubChem | 88636 | |
| EC number | 243-947-7 | |
| Jmol-3D images | {{#if:[OH-].[OH-].[OH-].[In+3]|Image 1 | |
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| Properties | ||
| Molecular formula | In(OH)3 | |
| Molar mass | 165.8404 g/mol | |
| Appearance | white | |
| Density | 4.38 g/cm3 | |
| Melting point | 150 °C; 302 °F; 423 K (decomp.) | |
| Solubility in water | insoluble | |
| Refractive index (nD) | 1.725 | |
| Structure | ||
| Crystal structure | cubic | |
| Space group | Im3 | |
| Coordination geometry |
octahedral | |
| Hazards | ||
| NFPA 704 |
 0
2
1
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| Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | ||
| Infobox references | ||
Indium(III) hydroxide is the chemical compound with the formula In(OH)3, its prime use is as a precursor to indium(III) oxide, In2O3.[1] It is sometimes found as the rare mineral dzhalindite.
Structure
In(OH)3 has a cubic structure, space group Im3, a distorted ReO3 structure[2][3]
Preparation and reactions
Neutralising a solution of an InIII salt such as In(NO3)3, indium nitrate or a solution of InCl3 gives a white precipitate that on ageing forms In(OH)3.[4][5] A thermal decomposition of freshly prepared In(OH)3 shows the first step is the conversion of In(OH)3.xH2O to cubic In(OH)3[4] The precipitation of indium hydroxide was a step in the separation of indium from zincblende ore by Reich and Richter the discoverers of indium.[6]
In(OH)3 is amphoteric, like Ga(OH)3 and Al(OH)3 but is much less acidic than Ga(OH)3[5] having a lower solubility in alkali than in acid[7] and is for all intents and purposes a basic hydroxide.[8] Dissolving In(OH)3 in strong alkali gives solutions that probably contain either four coordinate In(OH)4– or In(OH)4(H2O)–[8] Reaction with acetic acid or carboxylic acids is likely to give the basic acetate or carboxylate salt, e.g. In(OH)(OOCCH3)2.[7]
At 10MPa pressure and 250-400 °C In(OH)3 converts to indium oxide hydroxide, InO(OH) (which has a distorted rutile structure)[5]
Rapid decompression of samples of In(OH)3 compressed at 34 GPa causes decomposition, yielding some indium metal [9]
Laser ablation of In(OH)3 gives InOH, indium(I) hydroxide, a bent molecule with an In-O-H angle of around 132 ° and an In-O bond length of 201.7 pm [10]
References
- ↑ The Group 13 Metals Aluminium, Gallium, Indium and Thallium: Chemical Patterns and Peculiarities, Simon Aldridge, Anthony J. Downs, wiley, 2011, ISBN 978-0-470-68191-6
- ↑ Hydrothermal Investigation of the systems In2O3-H2O-Na2O and In2O3-D2O-Na2O. The crystal structure of rhombohedral In2O3 and In(OH)3, A Norlund Christensen, N.C. Broch, Acta Chemica Scandinavica 21 (1967) 1046-056
- ↑ Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications ISBN 0-19-855370-6
- ↑ 4.0 4.1 Sato, T. (2005). "Preparation and thermal decomposition of indium hydroxide". Journal of Thermal Analysis and Calorimetry 82 (3): 775–782. doi:10.1007/s10973-005-0963-4. ISSN 1388-6150.
- ↑ 5.0 5.1 5.2 Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0123526515
- ↑ Advanced Inorganic Chemistry-Vol.-I,31st Edition, 2008, Krishna Prakashan Media,ISBN 13: 9788187224037, ISBN 10: 8187224037
- ↑ 7.0 7.1 The Aqueous Chemistry of the Elements, George K. Schweitzer , Lester L. Pesterfield , Oxford University Press, 19 Dec 2009,ISBN 019539335X, ISBN 978-0195393354
- ↑ 8.0 8.1 Anthony John Downs (1993). Chemistry of aluminium, gallium, indium, and thallium. Springer. ISBN 0-7514-0103-X.
- ↑ Gurlo, Aleksander; Dzivenko, Dmytro; Andrade, Miria; Riedel, Ralf; Lauterbach, Stefan; Kleebe, Hans-Joachim (2010). "Pressure-Induced Decomposition of Indium Hydroxide". Journal of the American Chemical Society 132 (36): 12674–12678. doi:10.1021/ja104278p. ISSN 0002-7863.
- ↑ Lakin, Nicholas M.; Varberg, Thomas D.; Brown, John M. (1997). "The Detection of Lines in the Microwave Spectrum of Indium Hydroxide, InOH, and Its Isotopomers". Journal of Molecular Spectroscopy 183 (1): 34–41. doi:10.1006/jmsp.1996.7237. ISSN 0022-2852.
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