Titanium(II) oxide

Titanium(II) oxide

Chembox new
ImageFile = Titanium(II)_oxide.jpg
ImageName = Titanium(II) oxide
OtherNames = titanium monoxide
Section1 = Chembox Identifiers
CASNo = 12137-20-1
Section2 = Chembox Properties
Formula = TiO
MolarMass = 63.866 g/mol
Appearance = bronze crystals
Density = 4.95 g/cm³, solid
MeltingPt = 1750°C
BoilingPt =
Section3 = Chembox Structure
CrystalStruct = cubic
Section7 = Chembox Hazards
EUClass = not listed

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.Egon Wiberg, Arnold Frederick Holleman (2001) "Inorganic Chemistry", Elsevier ISBN 0123526515] 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 higher resistivity [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] There is also a high temperature form with titanium atoms with trigonal prismatic coordination. [Greenwood&Earnshaw] Acid solutions of TiO are stable for a short then decompose to give hydrogen:

:Ti2+ + H+ → Ti3+ + ½ H2

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