Titanium Halide

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Titanium Halide

 

any one of the compounds of titanium and the halogens of the general formula TiXn, where X is a halogen and n = 2–4. The higher halides, TiX4, are more stable and have been studied more thoroughly than the lower halides. The tetra-halides, TiX4, are formed from the reaction of titanium with dry halogens: with fluorine at 150°C, chlorine at 300°C, bromine at 360°C, and iodine at 55°C. From the standpoint of use, the most important tetrahalides are the chlorides and iodides.

Titanium tetrachloride, TiCl4, is a heavy, colorless liquid with a pungent odor, a density of 1.727 g/cm3 at 20°C, and a boiling point of 136°C; the compound fumes upon exposure to air. It is obtained from the action of chlorine on a mixture of TiO2 and carbon at a temperature of 700°–800°C. Titanium tetrachloride serves as starting material in the commercial production of metallic titanium; its military use derives from its ability to create smoke screens, described by the reaction TiCl4 + 2H2O = TiO2+ 4HC1. Titanium tetraiodide, Til4, occurs as reddish brown crystals with a metallic luster, a density of 4.27–4.40 g/cm3, a melting point of 150°–156°C, and a boiling point of 377°C. It is used in producing titanium metal of high purity.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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