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Cesium Iodide vs. Gallium Arsenide

Both cesium iodide and gallium arsenide are non-glass optical ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is cesium iodide and the bottom bar is gallium arsenide.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 4.0
85
Knoop Hardness 20
750
Poisson's Ratio 0.21
0.31

Thermal Properties

Melting Onset (Solidus), °C 620
1400
Specific Heat Capacity, J/kg-K 200
360
Thermal Conductivity, W/m-K 1.1
47
Thermal Expansion, µm/m-K 48
5.6

Otherwise Unclassified Properties

Density, g/cm3 4.5
5.3
Light Transmission Range, µm 0.25 to 55
1.0 to 16
Refractive Index 1.9
3.4

Common Calculations

Stiffness to Weight: Axial, points 0.49
8.9
Stiffness to Weight: Bending, points 12
28
Thermal Diffusivity, mm2/s 1.2
25