Titanium(III) sulfide, also called dititanium trisulfide or titanium sesquisulfide, is a
chemical compound with the formula
Ti2 S3.
Preparation
Titanium(III) sulfide is obtained from
titanium disulfide, TiS
2, by heating at 1000 °C in a vacuum
or by reduction with hydrogen at high temperatures.
It can also be synthesized by direct combination of the elements under pressure or at 800 °C.
Properties
Titanium(III) sulfide is a black powder
that can also be crystalline or shiny.
The crystal has the
nickel arsenide structure (hexagonal close-packed), with a coordination number of 6 for titanium.
Titanium(III) sulfide is air- and water-stable at normal temperatures and unlike titanium disulfide does not give off an odor of
hydrogen sulfide
Hydrogen sulfide is a chemical compound with the formula . It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs. The unde ...
.
In hot
sulfuric acid
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formu ...
, Ti
2S
3 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
Hydrogen sulfide is a chemical compound with the formula . It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs. The unde ...
.
References
{{Sulfides
Titanium compounds
Sesquisulfides