Titanium(III) oxide

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Titanium(III) oxide
IUPAC name
titanium(III) oxide
Other names
titanium sesquioxide
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3D model (JSmol)
ECHA InfoCard 100.014.271 Edit this at Wikidata
  • InChI=1S/3O.2Ti
  • O=[Ti]O[Ti]=O
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)
+125.6·10−6 cm3/mol
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

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]

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]


  1. ^ a b c d Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  2. ^ Mindat, http://www.mindat.org/min-38695.html
  3. ^ 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.