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CRYSTAL QUARTZ
Optical Quality Cultured Crystalline Quartz features high transmittance in
ultraviolet, visible and infrared spectrum from 190 to 2900 nm, birefringence,
ability to rotate plane polarized light, high damage threshold and resistance to
scratching. Optical quality material is virtually bubble and inclusion free,
grade A striae.
Maximum available size: 100 mm along axis <100> and <010> and 50 mm
along <001> axis.
Transmittance
Main Properties
| Chemical Formula |
SiO2 |
| Molecular Weight |
60.06 |
| Density, g/cm3 |
2.635-2.660 |
| Crystal Class |
Hexagonal |
| Transmission Range, µm |
0.4-3.5 |
| Reflection Loss,% for two surfaces at 2 µm |
8.2 |
Dielectric Constant for 3x107 Hz at 295 K
perpendicular
parallel |
4.34
4.27 |
| Melting Temperature, K |
1740 |
Thermal Conductivity, W/(m K)
at 20 K (parallel/perpendicular)
at 194 K (parallel/perpendicular)
at 323 K (parallel/perpendicular) |
720/370
20/10
10.7/6.2 |
Thermal Expansion, 1/K at 273-253 K
parallel
perpendicular |
7.64x10-6
14.0x10-6 |
| Specific Heat, cal/(g K) at 273 K |
0.17 |
| Debye Temperature, K |
470 |
| Bandgap, eV |
8.4 |
| Solubility in water |
None |
| Mohs Hardness |
7 |
| Knoop Hardness, kg/mm2 |
741 |
Young's Modulus, GPa
perpendicular
parallel |
76.5
97.2 |
| Shear Modulus, GPa |
31.14 |
| Bulk Modulus, GPa |
36.4 |
Refractive Index
|
Wavelength, µm |
no |
ne |
Wavelength, µm |
no |
ne |
| 0.185 |
1.65751 |
1.68988 |
1.5414 |
1.52781 |
1.53630 |
| 0.198 |
1.65087 |
1.66394 |
1.6815 |
1.52583 |
1.53422 |
| 0.231 |
1.61395 |
1.62555 |
1.7614 |
1.52468 |
1.53301 |
| 0.340 |
1.56747 |
1.57737 |
1.9457 |
1.52184 |
1.53004 |
| 0.394 |
1.55846 |
1.56805 |
2.0531 |
1.52005 |
1.52823 |
| 0.434 |
1.55396 |
1.56339 |
2.30 |
1.51561 |
|
| 0.508 |
1.54822 |
1.55746 |
2.60 |
1.50986 |
|
| 0.5893 |
1.54424 |
1.55335 |
3.00 |
1.49953 |
|
| 0.768 |
1.53903 |
1.54794 |
3.50 |
1.48451 |
|
| 0.8325 |
1.53773 |
1.54661 |
4.00 |
1.46617 |
|
| 0.9914 |
1.53514 |
1.54392 |
4.20 |
1.4569 |
|
| 1.1592 |
1.53283 |
1.54152 |
5.00 |
1.417 |
|
| 1.3070 |
1.53090 |
1.53951 |
6.45 |
1.274 |
|
| 1.3958 |
1.52977 |
1.53832 |
7.00 |
1.167 |
|
| 1.4792 |
1.52865 |
1.53716 |
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