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LiTaO3
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AO & EO Crystals
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Basic Properties of LiTaO3：
| Crystal Structure | Trigonal, Space group R3c, Point group 3m |
| Cell Parameters | a=5.154Å，c=13.781Å |
| Melting Point | 1650℃ |
| Curie Temperature | 607℃ |
| Mohs Hardness | 5.5 |
| Density | 7.46g/cm3 |
| Dielectric Constants |
ε11/ε0：51.7 ε33/ε0：44.5 |
| Elastic Stiffness Coefficients |
CE11：2.33（×1011N/m2） CE33：2.77（×1011N/m2） |
| Piezoelectric Strain Constants |
d22：2.4（×10-11C/N） d33：0.8（×10-11C/N） |
| Transmission range | 400-4500nm |
| Electro-optical coefficients | r33=30.4pm/V |
| Refractive index at 632.8nm | no=2.176，ne=2.180 |
Typical Specifications：
|
Type Specifications |
Boule | Wafer | ||
| Diameter | Φ3″ | Φ3″ | Φ4″ | |
| Length or Thickness | ≤100mm | ≤50mm | 0.35-0.5mm | |
| Orientation | 127.86°Y，64°Y，135°Y，X，Y，Z，and other cut | |||
| Ref. Flat Orientation | X，Y | |||
| Ref. Flat Length | 22±2mm | 2mm | 22±2mm | 32±2mm |
| Front Side Polishing | Mirror polished 5-15Å | |||
| Back Side Lapping | 0.3-1.0μm | |||
| Flatness（μm） | ≤15 | |||
| Bow（μm） | ≤25 | |||
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