Tantalum telluride
| Names | |
|---|---|
| IUPAC name
tantalum(IV) telluride
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| Other names
tantalum ditelluride
tantalum telluride | |
| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.031.882 |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| TaTe2 | |
| Molar mass | 436.145 g/mol |
| Density | 9.4 g/cm3 |
| Structure | |
| Monoclinic, mS18 | |
| C2/m, No. 12 | |
| Related compounds | |
Other anions
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Tantalum(IV) sulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Tantalum telluride is a chemical compound of tantalum and tellurium. It is most commonly found as a layered transition metal dichalcogenide (TMD) with the chemical formula TaTe2.
TaTe2 hosts structural distortions that are stable at room temperature, resulting in a distorted monoclinic structure, referred to as the 1T' phase. Below a temperature of approximately 170 K, it undergoes a charge density wave (CDW) phase transition to the low temperature (LT) phase, where double zigzag chains reconstruct into discrete "butterfly" clusters. This is accompanied by a sharp drop in electrical resistivity, distinguishing it from the metal-insulator transitions found in materials like TaS2.
Tantalum also forms a tantalum rich telluride with the approximate formula Ta1.6Te that is unusual in that it forms dodecagonal chalcogenide quasicrystals, a formation that cannot occur in a normal crystal because it does not result in a periodic crystal lattice.