Crystal Quartz SiO2

Crystal Quartz (SiO2) SDS
Crystal Quartz (SiO2) Data Sheet

Optically, Crystalline Quartz is used extensively as a wave retardation medium. The birefringent properties of Quartz are of use in quarter-wave plates and in polarisers. Quartz should not be processed or used at temperatures greater than 490 °C

Crystalline quartz is also used for electronic filters and resonators. However, Crystran Ltd. does not deal in material for this application.

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Transmission Range
0.18 to 3.5 μm and 40μm to 100μm
Refractive Index
No 1.54421 ; Ne 1.55333 @ 0.6μm
Reflection Loss
8.8% at 0.6 μm (2 surfaces)
Absorption Coefficient
n/a
Reststrahlen Peak
n/a
dn/dT
-5.5 x 10-6/°K (para) & -6.5 x 10-6/°K (perp) @ 633nm (3) (4)
dn/dμ = 0
1.3 μm
Density
2.649 g/cc
Melting Point
1710°C
Thermal Conductivity
10.7 (para) 6.2 (perp) W m-1 K-1 at 323 K
Thermal Expansion
7.1 (para) 13.2 (perp) x 10-6/°C
Hardness
Knoop 741 with 500g indenter
Specific Heat Capacity
710 J Kg-1 K-1 (3)
Dielectric Constant
4.34 (para) 4.27 (perp) at 30MHz
Youngs Modulus (E)
97.2 (para) 76.5 (perp) GPa
Shear Modulus (G)
31.14 GPa
Bulk Modulus (K)
36.4 GPa
Elastic Coefficients
C11=87 C12=7 C44=58 C13=13 C14=(-)18 C33=106 (1) (2)
Apparent Elastic Limit
41 MPa (5950psi) (4)
Poisson Ratio
n/a
Solubility
Insoluble in water
Molecular Weight
60.06
Class/Structure
Trigonal (hex) P3(2)21 (RH) and P3(1)21 (LH)

To download this data or our SDS safety data sheet as a pdf, please click on the links at the top of the page. To expand the transmission graphs, please click on the image.

Click to access our Quartz Crystal (SiO2) Guide

Click to access current Crystal Quartz Stock Windows

µm No Ne
0.193 1.661 1.675
0.213 1.632 1.645
0.222 1.622 1.634
0.226 1.619 1.630
0.248 1.602 1.613
0.257 1.596 1.607
0.28 1.585 1.596
0.308 1.576 1.586
0.325 1.571 1.581
0.351 1.565 1.575
µm No Ne
0.400 1.558 1.567
0.458 1.552 1.561
0.488 1.550 1.559
0.515 1.548 1.557
0.532 1.547 1.556
0.59 1.544 1.553
0.633 1.543 1.552
0.67 1.541 1.551
0.694 1.541 1.550
0.755 1.539 1.548
µm No Ne
0.780 1.539 1.548
0.800 1.538 1.547
0.820 1.538 1.547
0.860 1.537 1.547
0.980 1.535 1.546
1.064 1.534 1.543
1.32 1.531 1.539
1.55 1.528 1.536
2.01 1.521 1.529

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.

Normal Quartz is Alpha Quartz and normally RH rotating. LH rotating is available on special order. See our guide on distinguishing the types.

At temperatures >490°C, Crystal Quartz starts to revert to glassy state, a process which is complete by 530°C. At this time, as annealling is unlikely, fracture of component is probable.

REFERENCES:
(1)J.V.Atansoff and P.J.Hart, Phys. Rev. Vol.59, pp 85-96 1941
(2)A.W.Lawson, Phys. Rev. Vol 59, pp.838-839, 1941
(3) F.J.Micheli, Ann.Physik 4:7 (1902)
(4) Toyoda & Yabe J. Phys. D: Appl. Phys.,1 6 (1983)

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