Aluminium antimonide

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Aluminium antimonide
Aluminium-antimonide-unit-cell.png
Identifiers
CAS number 25152-52-7 YesY
PubChem 91307
ChemSpider 82452 YesY
EC number 246-667-3
Jmol-3D images Image 1
Properties
Molecular formula 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)
Solubility in water insoluble
Band gap 1.58 eV
Refractive index (nD) 3.3
Structure
Crystal structure Zinc blende
Space group T2d-F-43m
Coordination
geometry
Tetrahedral
Thermochemistry
Std molar
entropy
So298
65 J/mol K
Std enthalpy of
formation
ΔfHo298
-50.4 kJ/mol
Hazards
MSDS MSDS
NFPA 704
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., gasoline) Health code 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g., sodium chloride Reactivity code 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g., calcium Special hazards (white): no codeNFPA 704 four-colored diamond
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

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.

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 alloyed with other III-V materials to produce the following ternary materials: 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[edit]

References[edit]

  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