Titanium(III) sulfide
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| Names | |
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| IUPAC name
titanium(3+);trisulfide
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Other names
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| Identifiers | |
3D model (JSmol)
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PubChem CID
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| 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).
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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]
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