Lithium fluoride (LiF) crystal

optical

LiF(Lithium Fluoride) LiF(lithium fluoride crystal) is an optical infrared crystal which transmits from 0.10 to 7µm. 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)