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Zinc Sulfide (ZnS)

Zinc Sulfide (ZnS)

Refractive index(10.6 m) 2.19
Temperature variation of refractive index (°C-1) 4.33 x 10-5
Index of refraction inhomogeneity (ppm) <100
Density (gm / cc) 4.08

Grain size (microns)

20-100
Flexural strength (psi, 4-pt loading) 15,000
Young's modulus (psi) 10.8 x 106

Hardness (Knoop, 50 gm)

250
Electrical resistivity (ohm-cm) ~1012
Thermal expansion/°C (RT -500°C) 7.85 x 10-6
Thermal conductivity(25C, cgs) 0.040

Specific heat(cal / gm C)

0.112

Index of Refraction

0.50 microns 2.419
1.00 microns 2.292
3.00 microns 2.257
5.00 microns 2.246
7.00 microns 2.232
9.00 microns 2.212
10.60 microns 2.192
11.00 microns 2.186
13.00 microns 2.152
15.00 microns 2.106