| Transmission Wavelength Range | 120nm---7000nm |
| Density (g Cm-3) | 2.639 |
| Melting Point (℃) | 870 |
| Dielectric Constant | 9.1 @ 25℃ |
| Coefficient Of Thermal Expansion (1/℃) | 37*10-6 |
| Bulk Elastic Modulus (gpa) | 62.03 |
| Shear Modulus (gpa) | 55.14 |
| Thermal Conductivity (j/k .m. S) | 40.1 @ 41℃ |
| Heat Capacity (j/g .k) | 1.562 @10℃ |
| Knoop Hardness (kg/mm2) | 102-113 |
| Apparent Elastic Limit (mpa) | 11.2 |
| Young's Modulus (gpa) | 64.79 |
| Poisson's Ratio | 0.32 |
| Elastic Coefficient | C11=97.4 C11=40.4 C11=55.4 |
| Water Solubility (g / L) | 2.7 |
| Refractive Index | 1.3943 @ 500nm |
| Thermooptic Coefficient , Dn/dt (1/k) | -12.7*10-6 @600nm |
| Reflection Loss (%) | 5.3 @500.nm |
| Technical Requirement | Commercial Grade | Precision Grade | High Precision Level |
| Size Range | 1-600mm | 2-600mm | 2-600mm |
| Diameter Tolerance | 土0.1mm | 土0.025mm | 土0.01mm |
| Thickness Tolerance | 土0.1mm | 土0.025mm | 土0.01mm |
| Parallel Deviation | ±3´ | ±15´´ | ±5´´ |
| Surface Quality | 60-40 | 40-20 | 10月20日 |
| Surface Accuracy | 1.0λ | λ/10 | λ/20 |
| Inverted Edge | 0.1-0.5mm*45° | ||
| Material | Lithium fluoride （LiF） | ||
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