Titanium(III) sulfide

Titanium(III) sulfide
Names
	IUPAC name titanium(3+);trisulfide
	Other names Dititanium trisulfide; Titanium sesquisulfide;
Identifiers
CAS Number	12039-16-6 ;
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 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

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.
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.

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[:1-1] 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.

[:0-2] 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.