14 Apr 2021 LiF Transmittance Chart:
OPTICAL Transmission Range 0.12 to 8.5 microns Refractive Index 1.3943 at 0. 5 microns Reflection Loss 5.4% at 0.5 µm (2 surfaces) Restrahlen Peak 25 microns dN/dT -12.7 x 10-6/ °C at 0.6 microns PHYSICAL Density 2.63905 g/cm3 Melting Point 870 °C Thermal Conductivity 4. 01 W/(m K) at 41 °C Thermal Expansion 37 x 10-6/ °C Hardness Knoop 102 to 113 kg/mm2 with 600g indenter Specific Heat Capacity 1562 J/(kg K) at 10 °C Dielectric Constant 9.1 at 25 °C Young's Modulus (E) 64.79 GPa Shear Modulus (G) 55.14 GPa Bulk Modulus (K) 62.03 GPa Elastic Coefficients C11=97.4 C12=40.4 C44=55.4 Apparent Elastic Limit 11.2 MPa Poisson Ratio 0.326 CHEMICAL Solubility 0.27g/l00g water at 20 °C Molecular Weight 25.94 Class/Structure FCC, NaCl structure. Cleavage (100)
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