Aluminium antimonide
Aluminium antimonide (AlSb) is a semiconductor of the group III-V family containing aluminium and antimony. The lattice constant is 0.61 nm. The indirect bandgap is approximately 1.6 eV at 300 K, whereas the direct band gap is 2.22 eV.
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.042.410 |
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CompTox Dashboard (EPA) |
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| Properties | |
| AlSb | |
| Molar mass | 148.742 g/mol |
| Appearance | black crystals |
| Density | 4.26 g/cm3 |
| Melting point | 1,060 °C (1,940 °F; 1,330 K) |
| Boiling point | 2,467 °C (4,473 °F; 2,740 K) |
| insoluble | |
| Band gap | 1.58 eV |
Refractive index (nD) |
3.3 |
| Structure | |
| Zinc blende | |
| T2d-F-43m | |
| Tetrahedral | |
| Thermochemistry | |
Std molar entropy (S⦵298) |
65 J/mol K |
Std enthalpy of formation (ΔfH⦵298) |
-50.4 kJ/mol |
| Hazards | |
| NFPA 704 (fire diamond) | |
| 317 °C (603 °F; 590 K) | |
| Safety data sheet (SDS) | MSDS |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Its electron mobility is 200 cm²·V−1·s−1 and hole mobility 400 cm²·V−1·s−1 at 300 K. Its refractive index is 3.3 at a wavelength of 2 μm, and its dielectric constant is 10.9 at microwave frequencies.[1]
AlSb can be reacted with other III-V materials to produce ternary materials including AlInSb, AlGaSb and AlAsSb.
Aluminium antimonide is rather flammable because of the reducing tendency of the antimonide (Sb3−) ion. It burns to produce aluminium oxide and antimony trioxide.
References
- K Seeger and E Schonherr "Microwave dielectric constant of aluminium antimonide" Semicond. Sci. Technol. 6 (1991) 301 doi:10.1088/0268-1242/6/4/013
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