Editorial Feature

Aluminum Antimonide (AlSb) Semiconductors

Aluminium antimonide is a semiconductor of the group III-V family. It can be alloyed with other III-V semiconductor materials to produce aluminum arsenic antimonide, aluminum gallium antimonide, and aluminum indium antimonide. It is highly flammable due to its tendency to form (Sb3-) ion.


Aluminum antimonide finds applications in the following:

  • Electro-optical devices
  • X-ray and Gamma-ray radiation detection.

Chemical Properties

The chemical properties of aluminum antimonide are provided in the table below:

Chemical Properties
Chemical Formula AlSb
Molecular Weight 148.742
CAS No. 25152-52-7
Group Aluminum – 13
Antimony - 15
Crystal Structure Cubic
Lattice Constant 6.1355 Å

Electrical Properties

The electrical properties of aluminum antimonide are provided in the table below:

Electrical Properties
Dielectric Constant 11
Band Gap 1.6 eV
Electron Mobility 200-400 cm2/Vs
Hole Mobility 550 cm2/Vs

Thermal, Mechanical and Optical Properties

The thermal, mechanical, and optical properties of aluminum antimonide are provided in the tables below:

Thermal Properties
Heat of Formation 585 kJ/mol
Thermal Expansion Coefficient 4.20µm/m°C
Thermal Conductivity 60 W/mK
Debye Temperature 19°C
Mechanical Properties
Density 4.218 g/cm3
Melting Point 1057°C
Knoop Microhardness 4000
Optical Properties
Refractive Index 3.20

Safety Information

Safety Information
GHS Hazard Statements H315 - Causes skin irritation
H320 - Causes eye irritation
H331- Toxic if inhaled
Safety Precautions P233 - Keep container tightly closed
P260 - Do not breathe dust/fume/gas/mist/vapors/spray
P281- Use personal protective equipment as required
P309+311 - If exposed or you feel unwell: Call a poison center or doctor/physician.



  1. Mustafa Kamal Mustafa Kamal Egypt says:

    It is an interesing subject concerning Aluminium antimonide >
    Prof.Dr. Mustafa Kamal , Chairman of Metal Physics Faculty of Science Mansoura University Egypt

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