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Crystal Quartz

Crystal Quartz is a positive uniaxial birefringent single crystal grown using a hydrothermal process. It has excellent piezoelectric and optical performance, high physical and chemical stability and hardness with left-right-spin structure, and good transmission from the vacuum UV to the near infrared (0.2-2.3m). Our crystal quartz is selected to minimize inclusions and refractive index variation. Crystal quartz is most commonly used for high damage threshold waveplates, Polarization Rotators and tuning elements etc. polarization optics are utilized in laser optics.

 
Main Properties

 

Crystal Properties
Crystal Growth Method
hydrothermal process (water-heating method)
Maximum Size
IEC Ia grade: Z<40mm, X<110mm, Y<200mm
IEC I grade: Z<135mm, X<150mm, Y<280mm
Optical Properties
Transmission Range
0.2~2.3 m
Reflection Loss, for two surfaces at 2 m
8.2%
dn/dt (@633nm), /K
5x10-6
Refractive Index
See below
Wavelength (m)
no
ne
Wavelength (m)
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
 
0.7680
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
 
 
 
Transmission Curve See Below
 
Crystallographic Properties
Syngony
Hexagonal System
Crystal Form
Single Crystal, synthetic
Lattice Constant, Angstrom (Å)
trigonal, point group 32, a=4.9138 Å, c=5.4052 Å
Cleavability
Physical Properties
Density, g/cm3 at 20 C
2.65
Mohs Hardness
7
Dielectric Constant 3x107 Hz at 295 K
Parallel to c-axis (//)
Perpendicular to c-axis ()
4.27
4.34
Melting point, C
1710, 1657
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 to c-axis (//)
Perpendicular to c-axis ()
7.64x10-6
14.0x10-6
Specific Heat, cal/(g K) at 273 K
0.17
Debye Temperature, K
470
Bandgap, eV
8.4
Knoop Hardness, Kg/mm2
741
Youngs Modulus, Gpa
parallel
perpendicular
97.2
76.5
Shear Modulus, GPan
31.14
Bulk Modulus, Gpa at 273 K
36.4
Elastic Coefficient, Gpa
C11=86.6; C12=6.7; C13=12.4; C14=17.8; C33=106.4; C44=58
Chemical Properties
Chemical Formula
SiO2
Molecular Weight
60.06
Solubility in water at 20C, g/100cm3
insoluble

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