Crystallographic
|
Syngony |
Tetragon |
|
Symmetry Class |
3m |
|
Lattice Constants |
a = 4.758 Å c = 12.991 Å |
|
Cleavability |
(1011), (1120) imperfect |
Optical
|
Refractive Index at ne |
1.7771 |
|
Refractive Index at nF' - nC' |
0.0107 |
|
Thermal Coefficient of Refractive Index at 3.39 microns for ±60 °C |
βo = (0.88 ... 1.28) x 10-5 βe = (0.99 ... 1.39) x 10-5 |
|
Spectral Range, microns |
0.17 - 5.0 |
Thermal
|
Thermal Linear Expansion, °C-1 for ±60 °C |
|
|
⊥ to c-axis |
(3.24 ... 5.66) x 10-6 |
|
Thermal Conductivity, W/(m * °C) at 46 °C |
|
|
⊥ to c-axis |
25.2 |
|
|| to c-axis |
23.1 |
|
Specific Heat Capacity, J/(kg * °C) |
0.7610 x 103 |
|
Thermal Stability, °C |
162 ±8 |
|
Melting Point, °C |
2030 |
Mechanical
|
Density, g/cm3 at 20 °C |
3.98 |
|
Mohs Hardness |
9 |
|
Vickers Microhardness, Pa |
|
|
⊥ to c-axis |
2200 |
|
|| to c-axis |
1940 |
|
Constants of Elastic Compliance, Pa-1 |
S11 = 2.3 x 10-12 S12 = -0.7 x 10-12 S13 = 0.4 x 10-12 S33 = 2.2 x 10-12 S44 = -6.8 x 10-12 S14 = 0.5 x 10-12 |
|
Young Modulus (E), Pa |
|
|
⊥ to c-axis |
46.26 x 1010 |
|
|| to c-axis |
42.64 x 1010 |
|
Shear Modulus (G), Pa |
|
|
⊥ to c-axis |
14.43 x 1010 |
|
|| to c-axis |
16.29 x 1010 |
|
Poisson Ratio || to c-axis |
0.309 |
Chemical
|
Molecular Weight |
101.96 |
|
Solubility |
|
|
in water, gram/100 cm3 |
98 x 1010 |
Ref. Index vs. Wavelength λ
|
Wavelength, Microns |
Refractive Index no |
Refractive Index ne |
|
1.0 |
1.7545 |
1.7460 |
|
2.0 |
1.7374 |
1.7299 |
|
3.0 |
1.7015 |
1.6920 |
|
4.0 |
1.6748 |
1.6679 |
Internal Transmittance τ i (λ) vs. Wavelength λ
|
Wavelength, Microns |
Internal Transmittance |
|
0.2 |
0.79 |
|
0.5 |
0.97 |
|
1.0 |
0.97 |
|
3.0 |
0.97 |
|
5.0 |
0.45 |
Custom sizes and specifications are available on request.
