Titanium(III) oxide
Crystal structure
Names
IUPAC name
titanium(III) oxide
Other names
titanium sesquioxide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.014.271 Edit this at Wikidata
EC Number
  • 215-697-9
  • InChI=1S/3O.2Ti
    Key: GQUJEMVIKWQAEH-UHFFFAOYSA-N
  • O=[Ti]O[Ti]=O
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]
GHS09: Environmental hazard
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 tistarite.[4]

Other titanium(III) oxides include LiTi2O4 and LiTiO2.[5]

References

  1. ^ 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.
  2. ^ "C&L Inventory". echa.europa.eu. Retrieved 12 December 2021.
  3. ^ a b c d Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  4. ^ Mindat, http://www.mindat.org/min-38695.html
  5. ^ 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.