Transparency
range, nm 
350
 4500 
Crystal
structure, Point group 
orthorhombic,
point group mm2 
Space
group 
Pna2_{1} 
Lattice
parameters, Å 
a
= 12.818, b = 6.404, c = 10.596 Å 
Mohs
hardness 
5 
Density,
g/cm^{3} 
3.03 
Thermal
expansion coefficient, at 100 °C: 
±_{1}
= 8.7 x 10^{6 }x °C^{1} 

±_{2}
= 10.5 x 10^{6 }x °C^{1} 

±_{3}
= 0.2 x 10^{6 }x °C^{1} 
Thermal
conductivity, mW x cm ^{1} x °C ^{1}

k_{1}
= 20, k_{2} = 30, k_{3} = 33 
Nonlinear
coefficient, pm/V 
d_{31}
= 6.5; d_{32} = 5.0; d_{33} = 13.7; d_{34}
= 7.6; d_{35 }= 6.1; 
Electrooptic
coefficients 
r_{13}
= 9.5, r_{23} = 15.7, r_{33} = 36.3 pm/V 
Refractive
indexes: 

at
1064 nm 
n_{x}
= 1.738; n_{y} = 1.746; n_{z} = 1.830 
at
532 nm 
n_{x}
= 1.779; n_{y }= 1.789; n_{z} = 1.889 
Optical
damage threshold, MW/cm^{2} 
500
(1064 nm, 20 ns, 20 Hz) 
Conversion
efficiency, % 
60 (1064 nm, 10 ns, 50 Hz, 2 W) 