Crystallographic
|
Syngony |
Cubic |
|
Symmetry Class |
43m |
|
Lattice Constants |
a = 5.668 Å |
Optical
|
Refractive Index at ne |
2.6645 |
|
Refractive Index at nF' - nC' |
0.1841 |
|
Refractive Index at n10.6 |
2.4034 |
|
Refractive Index at n8.0 - n12.5 |
0.0285 |
|
Thermal Coefficient of Refractive Index at 3.39 microns for ±60 ℃ |
(6 ... 6.63) x 10-5 |
|
Transmission Range, microns |
0.55 - 18 |
Thermal
|
Thermal Linear Expansion, ℃-1 at 27 ℃ |
7.9 x 10-6 |
|
Thermal Conductivity, W/(m * ℃) at 20 ℃ |
14.1 |
|
Specific Heat Capacity, J/(kg * ℃) |
0.367 x 103 |
|
Thermal Stability, ℃ |
57 ±7 |
|
Melting Point, ℃ |
1520 ±15 |
Mechanical
|
Density, g/cm3 at 20 ℃ |
5.26 |
|
Mohs Hardness |
4 |
|
Vickers Microhardness, Pa |
(101 ±3) x 107 |
|
Young Modulus (E), Pa |
7.76 x 1010 |
|
Shear Modulus (G), Pa |
2.96 x 1010 |
|
Poisson Ratio |
0.311 |
Chemical
|
Molecular Weight |
144.33 |
|
Solubility |
|
|
in water, gram/100cm3 |
insoluble |
|
in acids |
soluble |
Ref. Index vs. Wavelength λ
| Wavelength, Microns | Refractive Index |
| 1.0 | 2.4894 |
| 2.0 | 2.4462 |
| 3.0 | 2.4376 |
| 4.0 | 2.4331 |
| 5.0 | 2.4296 |
| 6.0 | 2.4258 |
| 7.0 | 2.4219 |
| 8.0 | 2.4176 |
| 9.0 | 2.4123 |
| 10.0 | 2.4067 |
| 11.0 | 2.4006 |
| 12.0 | 1.3936 |
| 12.5 | 2.3891 |
| 15.0 | 2.3662 |
Internal Transmittanceτ i (λ) vs. Wavelength λ
| Wavelength, Microns | Internal Transmittance |
| 0.5 | 0.65 |
| 1.0 | 0.76 |
| 3.0 | 0.94 |
| 5.0 | 0.97 |
| 7.0 | 0.99 |
| 8.0 | 0.99 |
| 9.0 | 0.99 |
| 10.0 | 0.99 |
| 12.0 | 0.98 |
| 15.0 | 0.90 |
| 20.0 | 0.16 |
Custom sizes and specifications are available on request.
