Korth Kristalle GmbH

Refractive Index


Silver Bromide (AgBr)

Properties (AgBr)   
Transmission Range   0,49 - 32 µm  
Refractive Index   2,2421 @633 nm  
Reflective Loss   14,53% @0,67 µm  
Reststrahlen  112.7 µm  
Density   6.473 g/cm3  
Melting Point   432 °C  
Molecular Weight   187.77  
Thermal_Conductivity   1,21 W/(m·K) @273K  
Specific Heat   292 J/(kg·K) @273K)  
Thermal Expansion   35 · 10-6/K @298-333K  
Hardness (Mohs)   7  
Young`s Modulus   24,7 
Shear Modulus   8,8 
Bulk Modulus   44,03 
Rupture Modulus    
Elastic Coefficient   C11 = 56,3; C12 = 32,8; C44 = 7,26 GPa  
Dielectric Constant   13,1 (1 Mhz, 300K) 
Solubility in Water  0,000015 g/100g @20°C  
Type of Material   single crystal, synthetic  
Crystal structure   cubic, NaCl type structure, a=5,77 Å  
Cleavage Planes   No cleavage  
Standard diameter  70 mm 
Application  transmits further into IR, harder, less susceptible to solarisation comp. to AgCl 
Remarks  AgBr is soluble in acids and Ethanol. It is also very soft and shows (under pressure) cold liquidity. It is photochemical sensitive and the storage location has to be protected against light. It is corrosive in combination with metals, therefore binders has to consist of silver or teflon. IR optical windows can be produced by the process of hot forging by which an accurately weighed slug of cleaned material is forged against polished dies to produce a finished component in a cost effective manner.  

Transmission spectrum


Transmission spectrum-2

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