Titanium(III) sulfide

Titanium(III) sulfide
Names
IUPAC name
titanium(3+);trisulfide
Other names
  • Dititanium trisulfide
  • Titanium sesquisulfide
Identifiers
3D model (JSmol)
  • InChI=1S/3S.2Ti/q3*-2;2*+3
    Key: JMCREPCAQYAZSN-UHFFFAOYSA-N
  • [S-2].[S-2].[S-2].[Ti+3].[Ti+3]
Properties
Ti2S3
Molar mass 191.93
Appearance black solid
Density 3.684 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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

  1. ^ a b c Holleman, A. F.; Wiberg, E.; Wiberg, N. (2007). Lehrbuch der Anorganischen Chemie (102nd ed.). Berlin: Walter de Gruyter. p. 1525. ISBN 978-3-11-017770-1.
  2. ^ a b c d Gesellschaft Deutscher Chemiker; Deutsche Chemische Gesellschaft (1951). Titan (in German). Berlin, Heidelberg: Springer Berlin Heidelberg. doi:10.1007/978-3-662-13217-3. ISBN 978-3-662-13218-0.