透射鏡片材料 — Lithium Fluoride (LiF)氟化鋰

透射鏡片材料 — Lithium Fluoride (LiF)氟化鋰

Transmission Range0.116-7.4 (Dicke 2mm)
Refractive Index1.39126 @633 nm
Reflection Loss2.65% @0.633 μm
Residual Beam Wavelength26 μm (max. reflection)
Density2.63905 g/cm3
Melting point848°C
Molecular Weight25.94
Thermal Conductivity11.3 W/(m·K) @314 K
Spec. Heat Capacity1562 J/(kg·K)
Thermal Expansion37 · 10-6/ K @273…373K
Hardness (Mohs)102
Young’s Modulus64.79 GPa
Shear Modulus55.14 GPa
Bulk Modulus62.03 GPa
Fracture Modulus10.9 MPa
Elastic CoefficientC11?= 112; C12?= 45.6; C44?= 63.2 GPa
Dielectric Constant9.0 @298K, f = 100 Hz…10 GHz
Solubility in Water0.27g / 100g @18°C
Crystal StructureSingle crystal, synthetic
Crystal TypeCubic, NaCl type structure, a= 4.02 ?
Cleavage Planes(100)
Poisson Ratio0.22
ApplicationX-ray monochromator plates; Optical material for VUV applications

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