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石英结晶 Quartz Crystalline (SiO2)


Crystallographic


Syngony

Hexagonal

Symmetry Class

P3221

Lattice Constants

a = 4.9138 Å

c = 5.4052 Å


Optical


Refractive Index no at n0.436

1.5538

Refractive Index at ne at n0.436

1.5632

Thermal Coefficient of Refractive Index at 340 nm for +20/+100 ℃


no

-5.01 x 10-6

ne

-3.93 x 10-6

Transmission Range, microns

0.15 - 3.3


Thermal


Thermal Linear Expansion, ℃-1 for 0/+20 ℃

13.24 x 10-6

Thermal Conductivity, W/(m * ℃) at 25 ℃


no

6.82

ne

11.43

Specific Heat Capacity, J/(kg * ℃)

0.741 x 103

Melting Point, ℃

1470


Mechanical


Density, g/cm3 at 20 ℃

2.649

Mohs Hardness

7

Vickers Microhardness, Pa

981 x 107

Young Modulus (E), Pa


no

8.7 x 1010

ne

10.5 x 1010


Chemcical


Molecular Weight

60.06

Solubility


in water, gram/100cm3

insoluble


Ref. Index vs. Wavelength λ


Wavelength, Microns

Refractive Index no

Refractive Index ne

0.2001

1.6493

1.6623

0.2503

1.6003

1.6114

0.3034

1.5770

1.5872

0.4047

1.5572

1.5667

0.5086

1.5482

1.5575

0.6438

1.5423

1.5513

1.0000

1.5350

1.5438

1.2000

1.5323

1.5410

1.4000

1.5297

1.5383

1.6000

1.5270

1.5355

1.8000

1.5241

1.5324

2.5000

1.5116

1.5195

3.0000

1.4996

1.5070


Custom sizes and specifications are available on request.


 

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