Crystallographic
Syngony | Cubic |
Symmetry Class | m3m Pm3m |
Lattice Constants | a = 4.567 Å |
Optical
Refractive Index at n10.0 | 1.740 |
Refractive Index at n40.0 | 1.678 |
Thermal Coefficient of Refractive Index for 0-30℃ | (-1.27) ... (-1.51) x 10-5 |
Transmission Range, microns | 0.25 - 55 |
Absorbance μ (λ) , cm -1 | |
at 40 microns | 0.1 |
at 45 microns | 0.33 |
at 50 microns | 0.5 |
Thermal
Thermal Linear Expansion, ℃-1 for 0-30 ℃ | 48.1 x 10-6 |
Thermal Conductivity, W/(m * ℃) at 25 ℃ | 1.1 |
Specific Heat Capacity, J/(kg * ℃) | 200 |
Melting Point, ℃ | 621 |
Mechanical
Density, g/cm3 | 4.509 |
Mohs Hardness | 1-2 |
Young Modulus (E), Pa | 2 x 109 |
Shear Modulus (G), Pa | 6.24 x 109 |
Poisson Ratio | 0.214 |
Chemical
Molecular Weight | 259.81 |
Solubility | |
in water, gram/100 cm3 | 44 |
in acids | soluble |
Ref. Index vs. Wavelength λ
| Wavelength, Microns | Refractive Index |
0.25 | 2.210 |
0.5 | 1.807 |
1.0 | 1.758 |
2.0 | 1.747 |
3.0 | 1.744 |
5.0 | 1.743 |
10.0 | 1.740 |
15.0 | 1.735 |
20.0 | 1.728 |
25.0 | 1.719 |
30.0 | 1.708 |
35.0 | 1.695 |
40.0 | 1.678 |
45.0 | 1.659 |
50.0 | 1.637 |
55.0 | 1.611 |
Custom sizes and specifications are available on request.
