Lithium Tantalate ( LiTaO3 )

Lithium Tantalate LiTaO3 Lithium Tantalate LiTaO3  
Basic Properties          
Crystal Structure Trigonal, Space group R3c, Point group 3 m
Cell Parameters A = 5.154 Å C = 13.781 Å
Melting Point 1650 °C  
Curie Temperature 607 °C  
Mohs Hardness 5.5  
Density 7.46 g/cm³  
Dielectric Constant εe11 / εe0 51.7 εe33 / εe0 44.5
Elastic Stiffness Coefficient CE11 2.33 ( X 1011 N/m² ) CE33 2.77 ( X 1011 N/m² )
Piezoelectric Strain Constant d22 2.4 ( X 10-11 C/N ) d33 0.8 ( X 10-11 C/N )
Transmission Range 400 – 4500 nm  
Electro.optical coefficients r33 = 30.4 pm/V  
Refractive index at 632.8 nm n0 = 2.176 ne = 2.180
Typical SAW Properties          
Cut Type vs (m/s) k2s (%) TCV (10-6 / °C) TCD (10-6 / °C)
X-112° Y 3295 0.75 -16.50 22.3
Y-Z 3230 0.66   35