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Yttrium Aluminum Garnet (Y3Al5O12)

Crystal properties  
Crystal Type Yttrium-Aluminum-Garnet
Yttrium-Aluminum-Garnet
Crystal Structure single crystal, synthetic
Lattice Parameters a = 12.004 Å
Orientation 111, 100
Application active laser crystals
(dopants: Nd, Tm, Ho, Er, Cr)
spectroscopy
vacuum windows
Solubility in Water none
Dielectric Constant 11.7
Elastic Coefficients C11 = 3.33 GPa
C12 = 1.11 GPa
C44 = 1.15 Gpa
Young’s Modulus 300 Gpa
Hardness (Knoop) 1215 (8.5 Mohs)
Thermal Expansion 7.8 ×10–6 / K (111)
7.7 ×10–6 / K (110)
8.2 ×10–6 / K (100)
Specific Heat 590 J / (kg K)
Thermal Conductivity 14.0 W / (m K)
13.0 W / (m K)
Molecular Weight 593.618
Melting Point 1940 °C / 1970 oC
Density 4.56 g/cm3
dn / dT 9.86 ± 0.04 ×10–6 / K
7.3 ×10–6 / K
Refractive Index 1.8245   @ 0.8   µm
1.81523 @ 1.06 µm
1.8121   @ 1.4   µm
Transmission Range 0,25 ... 5 µm
Chemical Resistance Inert
Max. of Emission (nm) 550
Decay Constant (ns) 70
Absorption Length (cm) 2.61
Relative Efficiency (%) 125

YAG LASER ROD
Chemical Composition Y3Al5O12 (Yttrium Aluminium Garnet) 
Dopant Neodymium, Erbium
Dopant Concentration (atomic%) 0.4 ~ 1.1
Crystallographic Orientation (111) ± 5°
Diameters available (mm) 2 ~ 12
Diameters tolerance (?m) ± 25
Lengths available (mm) 30 ~ 250
End Face Flatness Within ?  / 10
Parallelism of end faces 10 arc seconds or less
End face perpendicularity 5 arc minutes or less
Extinction Ratio 30 dB Min.

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