Almaz Optics, Inc.
12 Chadsford Ct.  Marlton, NJ 08053, USA
Tel:  856 797-0491, Fax: 856 797-0228
e-mail: mail@almazoptics.com

 


































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, Ám 0.4-3.5
Reflection Loss,% for two surfaces at 2 Ám 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, Ám

no

ne

Wavelength, Ám

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