Titanium(II) oxide
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| Names | |
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| Other names
Titanium monoxide
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| Identifiers | |
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3D model (Jmol)
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| ECHA InfoCard | 100.032.020 |
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PubChem CID
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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 | |
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Titanium(III) oxide Titanium(III,IV) oxide Titanium(IV) oxide |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is   ?) |
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| Infobox references | |
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:
Evidence has been obtained for the presence of the diatomic molecule TiO in the interstellar medium. TiO shows strong bands in the optical spectra of cool (M-type) stars.
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