Chemical and Structural Properties
| Crystal Structure |
Orthorhombic, Space group Pna21, Point group mm2 |
| Lattice Parameter |
a=8.4473Å, b=7.3788Å , c=5.1395Å , Z=2 |
| Melting Point |
About 834℃ |
| Mohs Hardness |
6 |
| Density |
2.47 g/cm3 |
| Thermal Conductivity |
3.5W/m/K |
| Thermal Expansion Coefficient |
ax=10.8x10-5/K, ay= -8.8x10-5/K, az=3.4x10-5/K |
Optical and Nonlinear optical properties
| Transparency Range |
160-2600nm |
| SHG Phase Matchable Range |
551〜2600nm (Type I) 790-2150nm (Type II) |
Therm-optic Coefficient
(°C, l in μm) |
dnx/dT=-9.3X10-6
dny/dT=-13.6X10-6
dnz/dT=(-6.3-2.1l)X10-6 |
| Absorption Coefficient |
<0.1%/cm at 1064nm <0.3%/cm at 532nm |
| Angle Acceptance |
6.54mrad-cm (φ, Type I,1064 SHG)
15.27mrad-cm (q, Type II,1064 SHG) |
| Temperature Acceptance |
4.7°C-cm (Type I, 1064 SHG)
7.5°C-cm (Type II,1064 SHG) |
| Spectral Acceptance |
1.0nm-cm (Type I, 1064 SHG)
1.3nm-cm (Type II,1064 SHG) |
| Walk-off Angle |
0.60° (Type I 1064 SHG)
0.12° (Type II 1064 SHG) |
| NLO Coefficient |
Low frequency (pm/V) High frequency (pm/V)
| deff(I)=d32cosf(Type I in XY plane) |
| deff(I)=d31cos2q+d32sin2q(Type I in XZ plane) |
| deff(II)=d31cosq(Type II in YZ plane) |
| deff(II)=d31cos2q+d32sin2q(Type II in XZ plane) |
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