Antimony telluride
 Electron micrograph of a seamless Bi2Te3/Sb2Te3heterojunction and its atomic model (blue: Bi, green: Sb, red: Te)
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| Names | |
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| Other names
antimony telluride, antimony(III) telluride, antimony telluride, diantimony tritelluride
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| Identifiers | |
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.014.074 |
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PubChem CID
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| Properties | |
| Sb2Te3 | |
| Molar mass | 626.32 g·mol−1 |
| Appearance | grey solid |
| Density | 6.50 g cm−3 |
| Melting point | 620 °C (1,148 °F; 893 K) |
| Band gap | 0.21 eV |
| Thermal conductivity | 1.65 W/(m·K) (308 K) |
| Structure | |
| Trigonal, hR15 | |
| R3m, No. 166 | |
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a = 0.4262 nm, c = 3.0435 nm
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Formula units (Z)
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3 |
| Hazards | |
| US health exposure limits (NIOSH): | |
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PEL (Permissible)
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TWA 0.5 mg/m3 (as Sb) |
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REL (Recommended)
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TWA 0.5 mg/m3 (as Sb) |
| Related compounds | |
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Other anions
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Sb2O3 Sb2S3 Sb2Se3 |
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Other cations
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As2Te3 Bi2Te3 |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 (what is   ?) |
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| Infobox references | |
Antimony telluride is an inorganic compound with the chemical formula Sb2Te3. It is a grey crystalline solid with layered structure. Layers consist of two atomic sheets of antimony and three atomic sheets of tellurium and are held together by weak van der Waals forces. Sb2Te3 is a narrow-gap semiconductor with a band gap 0.21 eV; it is also a topological insulator, and thus exhibits thickness-dependent physical properties.
Antimony telluride can be formed by the reaction of antimony with tellurium at 500–900 °C.
Like other binary chalcogenides of antimony and bismuth, Sb2Te3 has been investigated for its semiconductor properties. It can be transformed into both n-type and p-type semiconductors by doping with an appropriate dopant.
Sb2Te3 forms the pseudobinary intermetallic system germanium-antimony-tellurium with germanium telluride, GeTe.
Like bismuth telluride, Bi2Te3, antimony telluride has a large thermoelectric effect and is therefore used in solid state refrigerators.
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