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Zinc Sulfide vs. Cesium Iodide

Both zinc sulfide 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 sulfide and the bottom bar is cesium iodide.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 75
4.0
Poisson's Ratio 0.28
0.21

Thermal Properties

Melting Onset (Solidus), °C 1830
620
Specific Heat Capacity, J/kg-K 520
200
Thermal Conductivity, W/m-K 27
1.1
Thermal Expansion, µm/m-K 6.5
48

Otherwise Unclassified Properties

Density, g/cm3 4.1
4.5
Light Transmission Range, µm 0.37 to 14
0.25 to 55
Refractive Index 2.3
1.9

Common Calculations

Stiffness to Weight: Axial, points 10
0.49
Stiffness to Weight: Bending, points 34
12
Thermal Diffusivity, mm2/s 13
1.2