Titanium oxides

Article By:

Walton, Richard Department of Chemistry, The Open University, Milton Keynes, United Kingdom.

Last reviewed:June 2020

DOI:https://doi.org/10.1036/1097-8542.801320

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• Titanium oxides, published June 2014:Download PDF Get Adobe Acrobat Reader

Chemical compounds of the metal titanium and oxygen. The most commonly found and used titanium oxides are the titanium dioxides, TiO₂; but other oxides are known including the sesquioxide Ti₂O₃, the monoxide TiO, and nonstoichiometric phases TiO_x, with x taking values between 0.7 and 1.3. Titanium dioxide exists in three common crystalline forms under ambient conditions: rutile, anatase (also known as octahedrite), and brookite (see table). Each polymorph contains titanium atoms surrounded by a distorted octahedron of oxygen atoms, and each form differs in the way in which the octahedral units are linked by various combinations of edge and corner sharing to give extended network structures (see illustration). Rutile is considered to be the most stable form of TiO₂, since at temperatures above 500°C both anatase and brookite are converted into rutile. See also: Oxide; Titanium

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