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