Titanium(III) sulfide

Titanium(III) sulfide

Names
IUPAC name titanium(3+);trisulfide
Other names Dititanium trisulfide Titanium sesquisulfide
Identifiers
CAS Number	12039-16-6  Y
3D model (JSmol)	Interactive image
PubChem CID	19601280
InChI InChI=1S/3S.2Ti/q3*-2;2*+3 Key: JMCREPCAQYAZSN-UHFFFAOYSA-N
SMILES [S-2].[S-2].[S-2].[Ti+3].[Ti+3]
Properties
Chemical formula	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). Infobox references

Titanium(III) sulfide, also called dititanium trisulfide or titanium sesquisulfide, is a chemical compound with the formula Ti ₂ S ₃.

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. 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. 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.