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Crystal properties
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Crystal Type
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cubic, NaCl type structure
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Transmission Range
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0.21 ... 30 µm
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Refractive Index
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1.488 @ 0.6 µm 1.454 @ 10.6 µm
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Reflective Loss
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6.8 % @ 10.0 µm
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Reststrahlen
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63.1 µm
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Density.
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1.989 g/cm3
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Melting Point
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776 °C
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Molecular Weight
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74.551
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Thermal Conductivity
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6.53 W/(m K)
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Specific Heat
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690 J/(kg K)
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Thermal Expansion
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36 × 10–6 / K
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Hardness (Knoop)
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7.2 <110> 9.3 <100>
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Young’s Modulus
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29.6 / 38.1 GPa
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Shear Modulus
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6.24 GPa
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Bulk Modulus
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17.36 GPa
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Rupture Modulus
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4.41 × 10–3 MPa
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Elastic Coefficient
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C11 = 40.2 C12 = 6.7 C44 = 6.29 GPa
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Dielectric Constant
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4.64 @ 25 °C, f = 1 MHz
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Solubility in Water
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34.7 g / 100 g @ 20 °C
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Crystal Structure
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Single crystal, synthetic
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Cleavage Planes
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(100)
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Standard Diameter
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180 mm bigger diameter on request
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Application
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IR spectroscopy windows for CO2 lasers protection windows for cutting lenses
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Remarks
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coating available high laser radiation resistance
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