Korth Kristalle GmbH

Refractive Index


Rubidium Bromide (



Properties (RbBr)   
Transmission Range (50% of total transmission)   0,25 - 40,0 µm (thickness 2mm)  
Refractive Index   1,5500 @633nm  
Reflective Loss   4,3% @10 µm  
Density   3.35 g/cm3  
Melting Point   693°C  
Molecular Weight   165.38  
Thermal Conductivity   12.2 W/(m·K) @378°C  
Heat Capacity   309.7 J/(kg·K) @25°C  
Thermal Expansion   37 · 10-6 /K @300K  
Hardness (Mohs)    
Young`s Modulus    
Shear Modulus    
Bulk Modulus   13.7 GPa 
Rupture Modulus    
Elastic Coefficient   C11 = 31.5; C12 = 4.8; C44 = 3.82 GPa  
Dielectric Constant   4,83 @300K 
Solubility in Water   116 g/100 g @25°C  
Crystal Structure  Single crystal, synthetic  
Crystal Type  Cubic, NaCl type structure, a0 = 6.854 Å
Cleavage Planes   (100) 
Poisson Ratio    
Application   IR optics (hardly used) 

Transmission spectrum


NOTICE: While we endeavour to ensure that the information on this Website is correct, we do not warrant the accuracy and completeness of the material on this Website.