Titanium(II) oxide

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Titanium(II) oxide
Titanium(II) oxide
Names
Other names
Titanium monoxide
Identifiers
12137-20-1 YesY
3D model (Jmol) Interactive image
ECHA InfoCard 100.032.020
PubChem 61685
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).
YesY verify (what is YesYN ?)
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.[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] 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]

Ti2+ + H+ → Ti3+ + ½ H2

Evidence has been obtained for the presence of the diatomic molecule TiO in the interstellar medium.[4] TiO shows strong bands in the optical spectra of cool (M-type) stars.[5]

References[edit]

  1. ^ a b c d Holleman, A. F.; Wiberg, E. (2001), Inorganic Chemistry, San Diego: Academic Press, ISBN 0-12-352651-5 
  2. ^ 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
  3. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0-08-037941-9. 
  4. ^ 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
  5. ^ http://www.stsci.edu/~inr/ldwarf.html