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.

Aluminium antimonide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.042.410
EC Number
  • 246-667-3
UNII
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
3.3
Structure
Zinc blende
T2d-F-43m
Tetrahedral
Thermochemistry
65 J/mol K
Std enthalpy of
formation (ΔfH⦵298)
 -50.4 kJ/mol
Hazards
Safety data sheet MSDS
NFPA 704 (fire diamond)
Flammability code 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineHealth code 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideReactivity code 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
3
0
1
317 °C (603 °F; 590 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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.

Aluminum antimonide is rather flammable because of the reducing tendency of the antimonide (Sb3−) ion. It burns to produce aluminum oxide and antimony trioxide.

See also

References
  1. 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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