Titanium(III) oxide
Titanium(III) oxide is the inorganic compound with the formula Ti2O3. A black semiconducting solid, it is prepared by reducing titanium dioxide with titanium metal at 1600 °C.[3]
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| Names | |
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| IUPAC name
titanium(III) oxide | |
| Other names
titanium sesquioxide | |
| Identifiers | |
3D model (JSmol) |
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| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.014.271 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| Ti2O3 | |
| Molar mass | 143.76 g/mol |
| Appearance | violet black powder |
| Odor | odorless |
| Density | 4.49 g/cm3 |
| Melting point | 2,130 °C (3,870 °F; 2,400 K) (decomposes) |
| insoluble | |
| +125.6·10−6 cm3/mol | |
| Structure[1] | |
| Corundum | |
| R3c (No. 167) | |
a = 543 pm α = 56.75°, β = 90°, γ = 90° | |
| Hazards | |
| GHS labelling:[2] | |
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| Warning | |
| H413 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Ti2O3 adopts the Al2O3 (corundum) structure.[3] It is reactive with oxidising agents.[3] At around 200 °C, there is a transition from semiconducting to metallic conducting.[3] Titanium(III) oxide occurs naturally as the extremely rare mineral in the form of tistarite.[4]
Other titanium(III) oxides include LiTi2O4 and LiTiO2.[5]
References
- Robinson, William R. (1974). "The crystal structures of Ti2O3, a semiconductor, and (Ti0.900V0.100)2O3, a semimetal". Journal of Solid State Chemistry. Elsevier BV. 9 (3): 255–260. Bibcode:1974JSSCh...9..255R. doi:10.1016/0022-4596(74)90082-6. ISSN 0022-4596.
- "C&L Inventory". echa.europa.eu. Retrieved 12 December 2021.
- Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
- Mindat, http://www.mindat.org/min-38695.html
- Hewston, T.A.; Chamberland, B.L. (1987). "A Survey of first-row ternary oxides LiMO2 (M = Sc-Cu)". Journal of Physics and Chemistry of Solids. 48 (2): 97–108. Bibcode:1987JPCS...48...97H. doi:10.1016/0022-3697(87)90076-X.
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