Titanium(III) oxide
Names | |
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IUPAC name
titanium(III) oxide
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Other names
titanium sesquioxide
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Identifiers | |
3D model (
JSmol ) |
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ChEBI | |
ChemSpider | |
ECHA InfoCard
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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°
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Hazards | |
GHS labelling:[2] | |
Warning | |
H413 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]
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
- ISSN 0022-4596.
- ^ "C&L Inventory". echa.europa.eu. Retrieved 12 December 2021.
- ^ ISBN 978-0-08-037941-8.
- ^ Mindat, http://www.mindat.org/min-38695.html
- .