Titanium(III) sulfide, also called dititanium trisulfide or titanium sesquisulfide, is a chemical compound with the formula Ti2S3.
Preparation
Titanium(III) sulfide is obtained from titanium disulfide, TiS2, by heating at 1000 °C in a vacuum[1] or by reduction with hydrogen at high temperatures.[2] It can also be synthesized by direct combination of the elements under pressure or at 800 °C.[2]
Properties
Titanium(III) sulfide is a black powder[1] that can also be crystalline or shiny.[2] The crystal has the nickel arsenide structure (hexagonal close-packed), with a coordination number of 6 for titanium.[1]
Titanium(III) sulfide is air- and water-stable at normal temperatures and unlike titanium disulfide does not give off an odor of hydrogen sulfide.
In hot sulfuric acid, Ti2S3 first forms a blue-gray slurry and then a colorless solution, while in cold concentrated sulfuric or nitric acid it forms a green-colored solution. With hot hydrochloric acid it forms hydrogen sulfide.[2]
References
^ abcHolleman, A. F.; Wiberg, E.; Wiberg, N. (2007). Lehrbuch der Anorganischen Chemie (102nd ed.). Berlin: Walter de Gruyter. p. 1525. ISBN978-3-11-017770-1.