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Syngony | Tetragonal |
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Symmetry Class | 4/mmm |
Lattice Constants | a = 4.64 Å c = 3.06 |
Cleavability | (100),(110) perfect |
Refractive Index at ne | 1.3786 |
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Refractive Index at nF' - nC' | 1.3904 |
Refractive Index at n10.6 | 0.0034 |
Refractive Index at n8.0 - n12.5 | 0.0110 |
Thermal Coefficient of Refractive Index at 3.39 microns for ±60 °C | bo = (0.15 ... 0.10) x 10-5 be = (0.15 ... 0.10) x 10-5 |
Transmission Range, microns | 0.13 - 7.0 |
Thermal Linear Expansion, °C-1 for ±60 °C |
|
---|---|
^ to c-axis | (6.23 ... 9.25) x 10-6 |
|| to c-axis | (10.86 ... 14.54) x 10-6 |
Specific Heat Capacity, J/(kg * °C) | 0.9200 x 103 |
Melting Point, °C | 1255 |
Density, g/cm3 at 20 °C | 3.18 |
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Mohs Hardness | 6 |
Vickers Microhardness, Pa | |
^ to c-axis | 441 x 107 |
|| to c-axis | 289 x 107 |
Constants of Elastic Compliance, Pa-1 | S11 = 12.45 x 10-12 S12 = -7.16 x 10-12 S13 = -1.66 x 10-12 S33 = 5.94 x 10-12 S44 = 17.54 x 10-12 S66 = 10.53 x 10-12 |
Young Modulus (E), Pa | |
^ to c-axis | 16.91 x 1010 |
|| to c-axis | 7.97 x 1010 |
Shear Modulus (G), Pa | |
^ to c-axis | 5.71 x 1010 |
|| to c-axis | 9.52 x 1010 |
Poisson Ratio | |
|| to c-axis | 0.577 |
Molecular Weight | 62.32 |
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Solubility | |
in water, gram/100 cm3 | 0.0076 |
in acids | soluble |
Wavelength, Microns | Refractive Index no | Refractive Index ne |
---|---|---|
0.2 | 1.4231 | 1.4367 |
0.5 | 1.3797 | 1.3916 |
1.0 | 1.3736 | 1.3852 |
2.0 | 1.3686 | 1.3797 |
3.0 | 1.3618 | 1.3724 |
4.0 | 1.3525 | 1.3622 |
5.0 | 1.3400 | 1.3487 |
6.0 | 1.3242 | 1.3315 |
7.0 | 1.3044 | 1.3101 |
Wavelength, Microns | Internal Transmittance |
---|---|
0.2 | 0.95 |
0.5 | 0.97 |
1.0 | 0.97 |
3.0 | 0.97 |
5.0 | 0.97 |
6.0 | 0.91 |
7.0 | 0.54 |
8.0 | 0.12 |