Cadmium arsenide

Cadmium arsenide
Other names Cadmium diarsenide
Identifiers
CAS number	12006-15-4
ChemSpider	10678197
EC number	234-484-1
Jmol-3D images	Image 1
SMILES [Cd+2].[Cd+2].[Cd+2].[AsH6-3].[AsH6-3]
InChI InChI=1/2As.3Cd/q2*-3;3*+2 Key: PYIKGNIRLAMTQG-UHFFFAOYAS
Properties
Molecular formula	Cd3As2
Molar mass	487.08 g/mol
Appearance	solid, dark grey
Density	3.031
Solubility in water	decomposes in water
Hazards
NFPA 704	1 4 0 W
U.S. Permissible exposure limit (PEL)	5 micrograms (Cd)/m3
LD50	no data
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Cadmium arsenide (Cd₃As₂) is a crystalline semiconductor with a tetragonal structure in the II-V family. It is a narrow gap semiconductor with an energy gap of 0.14 eV. The electron mobility is very large at ambient temperature. It is a n-type intrinsic semiconductor.

Cadmium arsenide can be prepared as amorphous semiconductive glass.

Cadmium arsenide shows the Nernst effect.

Cadmium arsenide is used in infrared detectors using Nernst effect, and in thin-film dynamic pressure sensors. It can be also used to make magnetoresistors, and in photodetectors. [1]

Cadmium arsenide can be used as a dopant for HgCdTe.

External links

• National Pollutant Inventory - Cadmium and compounds