Tantalum diselenide
| Names | |
|---|---|
| IUPAC name
Tantalum diselenide | |
| Other names
Tantalum(IV) diselenide Tantalum selenide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.031.713 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| TaSe 2 | |
| Molar mass | 338.87 g/mol |
| Appearance | Silverish/goldish solid |
| Structure | |
a = 0.343 nm (2H), 0.348 nm (1T), c = 1.27 nm (2H), 0.627 nm (1T) | |
| Related compounds | |
Other anions |
Tantalum ditelluride Tantalum disulfide |
Other cations |
Molybdenum diselenide Niobium diselenide Tungsten diselenide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Tantalum diselenide is a compound made with tantalum and selenium atoms, with chemical formula TaSe2, which belongs to the family of transition metal dichalcogenides. In contrast to molybdenum disulfide (MoS2) or rhenium disulfide (ReS2), tantalum diselenide does not occur spontaneously in nature, but it can be synthesized. Depending on the growth parameters, different types of crystal structures can be stabilized.
In the 2010s, interest in this compound has risen due to its ability to show a charge density wave (CDW), which depends on the crystal structure, up to 600 K (327 °C), while other transition metal dichalcogenides normally need to be cooled down to hundreds of kelvins or even below to observe the same capability.