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Aluminium arsenide

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Aluminium arsenide
CAS number 22831-42-1
PubChem 89859
SMILES [Al]#[As]
Molecular formula AlAs
Molar mass 101.9031 g/mol
Appearance orange crystals
Density 3.72 g/cm3
Melting point

1740 °C (2013 K)

Band gap 2.12 eV (indirect)[1]
Electron mobility 200 cm2/(V·s) (300 K)
Thermal conductivity 0.9 W/(cm·K) (300 K)
Refractive index (nD) 3 (infrared)
Crystal structure Zinc Blende
Space group T2d-F-43m
Related compounds
Related semiconductor materials Aluminium gallium arsenide, Aluminium indium arsenide, Aluminium antimonide, Boron arsenide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Aluminium arsenide is a chemical compound. Its chemical formula is AlAs. It has aluminium and arsenide ions in it.

Properties and preparation

Aluminium arsenide is a orange solid. It is toxic because it has arsenic in it. It is a semiconductor. It reacts with acids to make arsine. It is made by reacting aluminium and arsenic.

Related pages


  1. "AlxGa1-xAs". Ioffe Database. Sankt-Peterburg: FTI im. A. F. Ioffe, RAN. 

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