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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 Edit this at Wikidata
EC Number
  • 246-667-3
UNII
  • InChI=1S/Al.Sb checkY
    Key: LVQULNGDVIKLPK-UHFFFAOYSA-N checkY
  • InChI=1/Al.Sb/rAlSb/c1-2
    Key: LVQULNGDVIKLPK-XFZGNPHIAJ
  • [SbH+]12[Al-][SbH+]3[Al-][SbH+]([AlH-]14)[AlH-]1[Sb+]5([AlH-]38)[Al-]26[SbH+]2[AlH-]([Sb+]4)[SbH+]1[Al-][SbH+]3[AlH-]2[Sb+][AlH-]([SbH+]6[AlH-]([SbH+])[SbH+]68)[SbH+]([Al-]6)[AlH-]35
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
-50.4 kJ/mol
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 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. gasolineInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
0
3
1
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).
checkY verify (what is checkY☒N ?)

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.

See also

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References

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  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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