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

 

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