Back أكسيد التيتانيوم الثنائي Arabic اوکسید تیتانیوم (II) AZB Oxid titanatý Czech Titan(II)-oxid German اکسید تیتانیوم (II) Persian Oxyde de titane(II) French Տիտանի օքսիդ(II) Armenian 酸化チタン(II) Japanese Tlenek tytanu(II) Polish Oxid de titan (II) Romanian
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| Names | |
|---|---|
| IUPAC name
Titanium(II) oxide
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| Other names
Titanium monoxide
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| Identifiers | |
3D model (JSmol)
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| ECHA InfoCard | 100.032.020 |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| TiO | |
| Molar mass | 63.866 g/mol |
| Appearance | bronze crystals |
| Density | 4.95 g/cm3 |
| Melting point | 1,750 °C (3,180 °F; 2,020 K) |
| Structure | |
| cubic | |
| Hazards | |
| Flash point | Non-flammable |
| Related compounds | |
| Titanium(III) oxide Titanium(III,IV) oxide Titanium(IV) oxide | |
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(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.[1] 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.[1] In pure TiO 15% of both Ti and O sites are vacant,[1] as the vacancies allow metal-metal bonding between adjacent Ti centres. 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.[2] A high temperature form with titanium atoms with trigonal prismatic coordination is also known.[3] Acid solutions of TiO are stable for a short time then decompose to give hydrogen:[1]
- 2 Ti2+(aq) + 2 H+(aq) → 2 Ti3+(aq) + H2(g)
Gas-phase TiO shows strong bands in the optical spectra of cool (M-type) stars.[4][5] In 2017, TiO was claimed to be detected in an exoplanet atmosphere for the first time; a result which is still debated in the literature.[6][7] Additionally, evidence has been obtained for the presence of the diatomic molecule TiO in the interstellar medium.[8]
- ^ a b c d 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
- ^ Banus, M. D.; Reed, T. B.; Strauss, A. J. (1972-04-15). "Electrical and Magnetic Properties of TiO and VO". Physical Review B. 5 (8). American Physical Society (APS): 2775–2784. Bibcode:1972PhRvB...5.2775B. doi:10.1103/physrevb.5.2775. ISSN 0556-2805.
- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
- ^ Cite error: The named reference
Jorgensen1994was invoked but never defined (see the help page). - ^ "Spectral classification of late-type dwarfs".
- ^ Cite error: The named reference
Sedaghati2017was invoked but never defined (see the help page). - ^ Cite error: The named reference
Espinoza2019was invoked but never defined (see the help page). - ^ Dyck, H. M.; Nordgren, Tyler E. (2002). "The Effect of TiO Absorption on Optical and Infrared Angular Diameters of Cool Stars". The Astronomical Journal. 124 (1). American Astronomical Society: 541–545. Bibcode:2002AJ....124..541D. doi:10.1086/341039. ISSN 0004-6256. S2CID 117642107.