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.[1]
| Names | |
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| IUPAC name
titanium(III) oxide | |
| Other names
titanium sesquioxide | |
| Identifiers | |
CAS Number |
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3D model (JSmol) |
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| ChEBI | |
| ECHA InfoCard | 100.014.271 |
PubChem CID |
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CompTox Dashboard (EPA) |
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InChI
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| Properties | |
Chemical formula |
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) |
Solubility in water |
insoluble |
Magnetic susceptibility (χ) |
+125.6·10−6 cm3/mol |
| Hazards | |
EU classification (DSD) (outdated) |
not listed |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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| Infobox references | |
Ti2O3 adopts the Al2O3 (corundum) structure.[1] It is reactive with oxidising agents.[1] At around 200 °C there is a transition from semiconducting to metallic conducting.[1] Titanium(III) oxide occurs naturally as the extremely rare mineral tistarite.[2]
Other titanium(III) oxides include LiTi2O4 and LiTiO2.[3]
References
- 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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