Transparency
range, µm 
0.16 
3.6 
Point group 
4mm 
Space group 
I41cd 
Lattice
parameters, Å 
a = 9.479;
c = 10.297 
Density,
g/cm^{3} 
2.44 
Mohs hardness 
4.5 
Refractive
indexes: 

at
266 nm 
n_{o}
= 1.6664; n_{e} = 1.6031 
at 532
nm 
n_{o}=
1.6139, n_{e }= 0.5564 
at 1064
nm 
n_{o}
= 1.5980, n_{e} = 1.5432 
Nonlinear
coefficient, pm/V 
d_{31}
= 0.12 
Walk off 
1.9°
at 532 nm 
Temperature
acceptance, °C x cm 
3.5 
Angle acceptance 
1.52° x
cm^{1/2} 
Temperature
SHG tuning (Δ λ/Δ T) 
9.3 x 10^{E3}
nm/°C 
Dielectric
constant 
ε_{11}^{T}/ε_{0}
= 82.61; ε_{11}^{S}/ε_{0} =
78.80; 

ε_{33}^{T}/ε_{0}
= 87.92; ε_{33}^{S}/ε_{0} =
71.45; 
Thermal
expansion coefficient 
a_{11}
= 11.1 x 10^{6 }x °K^{1}; a_{33} =
3.74 x 10^{6} x °K^{1} 
Elastic
stiffness, 10^{10} N/m^{2} 
C_{11}^{E}
= 13.5; C_{33}^{E} = 5.68; C_{12}^{E}
= 0.375 

C_{44}^{E}
= 5.85; C_{13}^{E} = 3.35; C_{55}^{E}
= 14.67;

Piezoelectric
stress constants, C/m^{2} 
e_{15}
= 0.45; e_{31} = 0.209; e_{33} = 0.928 