Korth Kristalle GmbH

Refractive Index


Sodium Chloride (



Properties (NaCl)    
Transmission Range (50% of total transmission)   0.180 ... 20 µm (thickness 2mm)  
Refractive Index   1,541590 @633 nm  
Reflective Loss   3,93% @10 µm  
Reststrahlen   50.1 µm  
Density   2.164 g/cm3  
Melting Point   801°C  
Molecular Weight   58.45 
Thermal_Conductivity   6.49 W/(m·K) @289K 
Heat Capacity   869,9 J/(kg·K) @0°C 
Thermal Expansion   44 · 10-6 /K @-223...473K  
Hardness (Mohs)   18,2 <100>; (Prüflast 200g) 
Young`s Modulus   39.98 GPa  
Shear Modulus   12.61 GPa  
Bulk Modulus   24.42 GPa  
Rupture Modulus   2.4 MPa  
Elastic Coefficient   C11 = 49,1; C12 = 12,8; C44 = 12,8 GPa  
Dielectric Constant   5,9 @298K, f = 100 Hz...25 GHz  
Solubility in Water   36 g/100 g @25°C  
Crystal Structure   single crystal, synthetic  
Crystal Type  cubic, NaCl type structure, a0 = 5.64 A  
Cleavage Planes   (100)  
Poisson Ratio   0.26  
Application   material for IR optics, CO2 laser windows, substrate material for thin films, X-ray monochromator crystals  
Remarks   soluble in glycerol, slightly soluble in alcohol and ammonium hydroxide, insoluble in HCl, max. temperature for application: 400°C, dryness important for stockkeeping!, doped crystals on request  

Transmission spectrum


Transmission spectrum-2

Nacl englisch.JPG

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