Korth Kristalle GmbH

Refractive Index


Lithium Fluoride (



Properties (LiF)    
Transmission Range (50% of total transmission)  0,116-7,4 (Dicke 2 mm)  
Refractive Index   1,39126 @633 nm  
Reflective Loss   2,65% @0,633 µm  
Reststrahlen   26 µm (max. reflection)  
Density   2.63905 g/cm3  
Melting Point   848°C  
Molecular Weight   25.94  
Thermal Conductivity   11.3 W/(m·K) @41°C 
Heat Capacity   1562 J/(kg·K)  
Thermal Expansion   337 · 10-6/ K @273...373K  
Hardness (Mohs)   102  
Young`s Modulus   64.79 GPa  
Shear Modulus   55.14 GPa  
Bulk Modulus   62.03 GPa  
Rupture Modulus   10.9 MPa  
Elastic Coefficient   C11 = 112; C12 = 45.6; C44 = 63.2 GPa  
Dielectric Constant   9,0 @298K, f = 100 Hz...10 GHz  
Solubility in Water   0.27g / 100g @18°C  
Crystal Structure  Single crystal, synthetic  
Crystal Type  Cubic, NaCl type structure, a= 4.02 Å  
Cleavage Planes   (100)  
Poisson Ratio   0.22  
Application   X-ray monochromator plates; Optical material for VUV applications  
Remarks   Tends to create colour centers; max. temperature for application: 400°C  

Transmission spectrum


Transmission spectrum-2

LiF englisch

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