OPTICS CRYSTALS LASERS
   
 
Material - Crystal Quartz (SiO2)


Optically, crystalline quartz is used extensively as a wave retardation medium, using the birefringent properties for use in quarter-wave plates and in polarizers. Quartz is mined naturally, but more commonly produced synthetically in large long faceted crystals. Quartz is positive birefringent. Be careful not to confuse terminology in this material, as "fused quartz" is often used to denote the glassy non-crystalline form better known as silica.

Optical Quality Cultured Crystalline Quartz is available in three grades defined by optical absorption at two wavelength: 190 nm and 2800 nm (a - index of absorption, 1/cm).

BASE PROPERTIES

PARAMETER VALUE
OPTICAL  
  Transmission Range   0.4 - 4.5 µm  
  Reflection Loss   at 2.05 µm (2 surfaces) for o-ray 8.3%; for e-ray 8.5%;  
         
PHYSICAL  
  Density   2.635-2.660 g/cm3 at 289 K  
  Melting Temperature   1740 °C  
  Debye Temperature   470 K  
  Thermal Conductivity      
  at 20 K (parallel/perpendicular)   720/370 W/(m K)  
  at 194 K (parallel/perpendicular)   20/10W/(m K)  
  at 323 K (parallel/perpendicular)   10.7/6.2W/(m K)  
  Thermal Expansion    
  parallel   8.0 x 10-61/K at 273-253 K  
  perpendicular   13.4 x 10-6 1/K at 273-253 K  
  Knoop Hardness   741 kg/mm2  
  Specific Heat   0.17 cal/(g K) at 273 K  
  Dielectric Constant
for 3x107 Hz at 295 K
   
  parallel   4.27  
  perpendicular   4.34  
  Young's Modulus   15.85 GPa  
  parallel   97.2  
  perpendicular   76.5  
  Shear Modulus   31.14 GPa  
  Bulk Modulus   36.4 GPa  
CHEMICAL  
  Solubility in water   none  
  Molecular Weight   60.06  
  Crystal Class   Hexagonal  

REFRACTIVE INDEX
Wavelength, µm Refractive Index, no Refractive Index, ne
 
  0.185   1.65751   1.68988  
  0.198   1.65087   1.66394  
  0.231   1.61395   1.62555  
  0.340   1.56747   1.57737  
  0.394   1.55846   1.56805  
  0.434   1.55396   1.56339  
  0.508   1.54822   1.55746  
  0.5893   1.54424   1.55335  
  0.768   1.53903   1.54794  
  0.8325   1.53773   1.54661  
  0.9914   1.53514   1.54392  
  1.1592   1.53283   1.54152  
  1.3070   1.53090   1.53951  
  1.3958   1.52977   1.53832  
  1.4792   1.52865   1.53716  
  1.5414   1.52781   1.53630  
  1.6815   1.52583   11.53422  
  0.486   1.6678   1.4907  
  1.7614   1.52468   1.53301  
  1.9457   1.52184   1.53004  
  2.0531   1.52005   1.52823  
  2.30   1.51561    
  2.60   1.50986    
  3.00   1.49953    
  3.50   1.48451    
  4.00   1.46617    
  4.20   1.4569    
  5.00   1.417    
  6.45   1.274    
  7.00   1.167    
       

 



 
 
 
Blanks
Windows
Wedges

Ordering Info
 
  (c) Crystaltechno Ltd. Vernadskogo 113-106, Moscow 119571, Russia
+7 (495) 234-5951, 234-5952, 956-7610
fax +7 (495) 433-1551
sales@crystaltechno.com
Site suggestions: webmaster@crystaltechno.com