| Transmission Range | 0.43 to 5 μm |
| Refractive Index | No = 2.555 at 0.69 μm (1) (2) |
| Reflection Loss | 30% at 2 μm (2 surfaces) |
| Absorption Coefficient | n/a |
| Reststrahlen Peak | n/a |
| dn/dT | n/a |
| dn/dμ | 2.81 μm |
| Density | 4.252 g/cc |
| Melting Point | 1386°C |
| Thermal Conductivity | 12.5 (para); 8.7 (perp) W m-1 K-1 |
| Thermal Expansion | 9.2 (para); 7.1 (perp) x 10-6/°C |
| Hardness | Knoop 879 with 500g indenter |
| Specific Heat Capacity | 711 J Kg-1 K-1 |
| Dielectric Constant | 160 at 1 MHz |
| Young's Modulus (E) | n/a |
| Shear Modulus (G) | n/a |
| Bulk Modulus (K) | n/a |
| Elastic Coefficients | C11 = 269; C12 = 177; C13 = 146; C33 = 480; C44 = 124 |
| Apparent Elastic Limit | 4.8 MPa (700 psi) |
| Poisson Ratio | 0.28 |
| Solubility | Insoluble in water |
| Molecular Weight | 79.9 |
| Class/Structure | Tetragonal P42/mnm (#135), Rutile structure |
| μm | No | Ne | μm | No | Ne | μm | No | Ne |
|---|---|---|---|---|---|---|---|---|
| 0.436 | 2.853 | 3.216 | 0.589 | 2.616 | 2.903 | 3.38 | 2.41 | 2.58 |
| 0.492 | 2.725 | 3.051 | 0.691 | 2.555 | 2.836 | 3.79 | 2.39 | 2.57 |
| 0.496 | 2.718 | 3.042 | 0.708 | 2.548 | 2.826 | 4.28 | 2.34 | 2.51 |
| 0.546 | 2.652 | 2.958 | 1.01 | 2.484 | 2.747 | 4.89 | 2.32 | 2.49 |
| 0.577 | 2.623 | 2.921 | 1.530 | 2.454 | 2.710 | 5.73 | 2.24 | 2.43 |
| 0.579 | 2.621 | 2.919 | 2.42 | 2.40 | 2.59 |