Silver Gallium Sulfide (AgGaS2) Semiconductors

Topics Covered

Chemical Properties
Electrical Properties
Thermal, Mechanical and Optical Properties
Safety Information


Silver gallium sulfide has high transparency to short wavelengths and the phase-matching and nonlinear optical properties of the material allow various frequency mixing interactions from the visible to mid-IR region. Surface absorption of silver gallium sulfide also may increase with time.


Silver gallium sulfide finds applications in the following:

  • It has been used as an efficient frequency doubling crystal for nonlinear three-wave interactions
  • Optical parametric oscillators
  • Direct infrared counter measure systems.

Chemical Properties

The chemical properties of silver gallium sulfide are provided in the table below:

Chemical Properties
Chemical Formula AgGaS2
CAS No. 7782-49-2
Group Silver – 11
Gallium – 13
Sulfur – 16
Crystal Structure Tetragonal
Lattice Constant a = 5.756 Å
c = 10.301 Å

Electrical Properties

The electrical properties of selenium are provided in the table below:

Electrical Properties
Electrical Resistance >1012 Ω cm
Dielectric Constant 10
Band Gap 1.66 eV

Thermal, Mechanical and Optical Properties

The thermal, mechanical and optical properties of silver gallium sulfide are provided in the tables below:

Thermal Properties
Thermal Expansion Coefficient 12.5 x 10-6/°C
Specific Heat Capacity 1.9 J/cm3/°C
Thermal Conductivity 0.015 W/cm/°C
Mechanical Properties
Density 4.702 g/cm3
Melting Point 997°C
Young's Modulus 38.2 GPa
Poisson's Ratio 0.29
Optical Properties
Refractive Index 2.48
Chromatic Dispersion -0.205µm-1

Safety Information

Safety Information
GHS Hazard Statements H331 - Toxic if inhaled.
H301 - Toxic if swallowed.
H373 - May cause damage to organs through prolonged or repeated exposure.
H413 - May cause long lasting harmful effects to aquatic life.
Safety Precautions P261- Avoid breathing dust, gas, fume, vapors, spray, mist.
P264 - Wash exposed skin thoroughly after handling.
P270 - Do no eat, drink or smoke when using this product.
P273 - Avoid release to the environment.

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