PRODUCTS

Quartz crystal
Description
Optically, crystalline quartz is used extensively as a wave retardation medium, using the birefringent properties for use in
quarter-wave plates and in polarizes. Quartz is minednaturally, 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 - coefficient of absorption, 1/cm).
 
Quality Grade a max @ 190 nm a max @ 2800 nm 
A 0.010 0.030 
B 0.025 0.045 
C 0.050 0.070 
  
 
BASE PROPERTIES
PARAMETER VALUE
Crystal Class Hexagonal
Molecular Weight 60.06
Density  2.635-2.660 g/cm3 at 289 K
Dielectric Constant
for 3x107 Hz at 295 K 35 microns
parallel 4.27
perpendicular 4.34 
Reflection Loss 8.2 % for two surfaces at 2 mm
Melting Temperature 1740 K
Specific Heat 0.17 cal/(g K) at 273 K
Knoop Hardness 741 kg/mm2
Transmission Range 0.4 - 4.5 μm
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 97.2 GPa
perpendicular 76.5 GPa
Bulk Modulus 36.4 GPa
Shear Modulus 31.14 GPa
Solubility in water None
Bangap 8.4
 
REFRACTIVE INDEX
Wavelength, μm no ne
0.1850 1.65751 1.68988
0.1980 1.65087 1.66394
0.2310 1.61395 1.62555
0.3400 1.56747 1.57737
0.3940 1.55846 1.56805
0.4340 1.55396 1.56339
0.5080 1.54822 1.55746
0.5893  1.54424 1.55335
0.7680  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 1.53422
1.7614 1.52468 1.53301
1.9457 1.52184 1.53004
2.0531 1.52005 1.52823
2.3000 1.51561  
2.6000 1.50986
3.0000 1.49953
3.5000 1.48451
4.0000 1.46617
4.2000 1.45690
5.0000 1.41700
6.4500 1.27400
7.0000 1.16700

Ms. Lin

Mr. Wen

Ms.Chen