-oxide-3D-vdW.png) | |
| Names | |
|---|---|
| IUPAC name Titanium(II) oxide | |
| Other names Titanium monoxide | |
| Identifiers | |
3D model (JSmol) | |
| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.032.020 |
| EC Number |
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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 theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Titanium(II) oxide (TiO) is aninorganicchemical compound of titanium and oxygen. It can be prepared fromtitanium dioxide and titanium metal at 1500 °C.[1] It isnon-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]
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 anexoplanet 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]
