Korth Kristalle GmbH

Refractive Index


YAG (Yttrium Aluminium Garnet) (Y3Al2Al3O12)

Properties (Y3Al5O12)   
Transmission Range (50% of total transmission)   0,2 - 6,2 µm (Dicke 1/0,4 mm)  
Refractive Index   1,829452 @633 nm  
Reflective Loss  7,9% @3µm 
Density   4.56 g/cm3  
Melting Point   1950°C  
Molecular Weight   593.62  
Thermal_Conductivity   13,1 W/(m·K)  
Heat Capacity   628 J/(kg·K)  
Thermal Expansion   7,5 · 10-6/K @300K)  
Hardness (Mohs)   1350 (Indenter Load 200g)  
Young`s Modulus   280 GPa  
Shear Modulus   113 GPa 
Bulk Modulus   180 GPa 
Rupture Modulus   250 MPa  
Elastic Coefficients   C11 = 333; C12 = 111; C44 = 114 GPa  
Dielectric Constant   7,75 @298K  
Solubility in Water   none  
Crystal Structure  single crystal, synthetic  
Crystal Type  cubic  
Lattice Parameters   a = 12,008 Å  
Application   active laser crystals (dopants: Nd, Tm, Ho, Er, Cr), spectroscopy, vacuum windows, IR optics 
Orientation Crystal orientation is the classification of the inclination of the crystal surface in relation to its crystal lattice. Crystal orientation is usually denoted by the Miller indices, e.g. (111) or (110) (and directions parallel or perpendicular to it). The Miller index can only be used for single crystals, i.e. not just a solid but a homogenous uniformly oriented solid. Orientated crystals are used in the semiconductor industry or in fundamental physics. Specific crystal orientation can be achieved by cleavage (see material properties) or by directional cutting.    111, 100  
Poisson Ratio  0.24m 
Remarks  no double refraction therefore suitable as a substitute for sapphire in optical systems and also application as sturdy material for windows  

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