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Zinc Selenide vs. Cesium Iodide

Both zinc selenide and cesium iodide are non-glass optical ceramics. There are 12 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is zinc selenide and the bottom bar is cesium iodide.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
4.0
Poisson's Ratio 0.28
0.21

Thermal Properties

Melting Onset (Solidus), °C 1520
620
Specific Heat Capacity, J/kg-K 340
200
Thermal Conductivity, W/m-K 17
1.1
Thermal Expansion, µm/m-K 7.3
48

Otherwise Unclassified Properties

Density, g/cm3 5.3
4.5
Light Transmission Range, µm 0.6 to 21
0.25 to 55
Refractive Index 2.5
1.9

Common Calculations

Stiffness to Weight: Axial, points 7.3
0.49
Stiffness to Weight: Bending, points 26
12
Thermal Diffusivity, mm2/s 9.5
1.2