Aluminium arsenide

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

Aluminium arsenide
Identifiers
CAS number	22831-42-1
PubChem	89859
SMILES	[Al]#[As]
InChI InChI=1/Al.As/rAlAs/c1-2
Properties
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)
Electron mobility	200 cm2/(V·s) (300 K)
Thermal conductivity	0.9 W/(cm·K) (300 K)
Refractive index (nD)	3 (infrared)
Structure
Crystal structure	Zinc Blende
Space group	T2d-F-43m
Coordination geometry	Tetrahedral
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)

Properties and preparation

Aluminium arsenide is an 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

• Aluminium antimonide
• Zinc arsenide
• Arsenite