3D model (JSmol)
|Molar mass||63.866 g/mol|
|Melting point||1,750 °C (3,180 °F; 2,020 K)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Titanium(II) oxide (TiO) is an inorganic chemical compound of titanium and oxygen. It can be prepared from titanium dioxide and titanium metal at 1500 °C. It is non-stoichiometric in a range TiO0.7 to TiO1.3 and this is caused by vacancies of either Ti or O in the defect rock salt structure. In pure TiO 15% of both Ti and O sites are vacant. Careful annealing can cause ordering of the vacancies producing a monoclinic form which has 5 TiO units in the primitive cell that exhibits lower resistivity. A high temperature form with titanium atoms with trigonal prismatic coordination is also known. Acid solutions of TiO are stable for a short time then decompose to give hydrogen:
- 2Ti2+(aq) + 2H+(aq) → 2Ti3+(aq) + H2(g)
Gas-phase TiO shows strong bands in the optical spectra of cool (M-type) stars. In 2017, TiO was detected in an exoplanet atmosphere for the first time. Additionally, evidence has been obtained for the presence of the diatomic molecule TiO in the interstellar medium.
- Holleman, Arnold Frederik; Wiberg, Egon (2001), Wiberg, Nils, ed., Inorganic Chemistry, translated by Eagleson, Mary; Brewer, William, San Diego/Berlin: Academic Press/De Gruyter, ISBN 0-12-352651-5
- Electrical and Magnetic Properties of TiO and VO, Banus M. D., Reed T. B., Strauss A. J., Phys. Rev. B 5, 2775 - 2784, (1972)doi:10.1103/PhysRevB.5.2775
- Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0-08-037941-9.
- Sedaghati, Elyar; Boffin, Henri M.J.; MacDonald, Ryan J.; Gandhi, Siddharth; Madhusudhan, Nikku; Gibson, Neale P.; Oshagh, Mahmoudreza; Claret, Antonio; Rauer, Heike (14 September 2017). "Detection of titanium oxide in the atmosphere of a hot Jupiter". Nature. 549: 238-241. arXiv: . Bibcode:2017Natur.549..238S. doi:10.1038/nature23651. Retrieved 7 October 2017.
- Dyck, H. M.; Nordgren, Tyler E. "The effect of TiO absorption on optical and infrared angular diameters of cool stars" Astronomical Journal (2002), 124(1), 541-545. doi:10.1086/341039
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