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氯化钾 Potassium Chloride (KCl)


Crystallographic


Syngony

Cubic

Symmetry Class

m3m

Lattice Constants

a = 6.292 Å   c = a

Cleavability

(100), perfect


Optical


Refractive Index at ne

1.4930

Refractive Index at nF' - nC'

0.0112

Refractive Index at n10.6

1.4546

Refractive Index at n8.0 - n12.5

0.0172

Thermal Coefficient of Refractive Index at 3.39 microns for ±60 ℃

(-3.28 ... -3.75) x 10-5

Transmission Range, microns

0.21 - 21


Thermal


Thermal Linear Expansion, ℃-1 for ±60 ℃

(34.1 ... 38.3) x 10-6

Thermal Conductivity, W/(m * ℃) at 46 ℃

6.53

Specific Heat Capacity, J/(kg * ℃)

0.695 x 103

Melting Point, ℃

776


Mechanical


Density, g/cm3 at 20 ℃

1.98

Mohs Hardness

2

Vickers Microhardness, Pa

15 x 107

Constants of Elastic Compliance, Pa-1

S11 = 26.21 x 10-12 S12 = -3.47 x 10-12

S44 = 161.98 x 10-12

Young Modulus (E), Pa


in <100> direction

3.82 x 1010

in <110> direction

1.68 x 1010

Shear Modulus (G), Pa


in <100> direction

1.08 x 1010

in <110> direction

0.63 x 1010

Poisson Ratio

0.134

 

Chemical


Molecular Weight

74.55

Solubility


in water, gram/100 cm3

34.7


Ref. Index vs. Wavelength λ


Wavelength, Microns

Refractive Index

0.2

1.7170

0.5

1.4968

1.0

1.4796

2.0

1.4751

3.0

1.4735

4.0

1.4720

5.0

1.4703

6.0

1.4683

7.0

1.4659

8.0

1.4632

9.0

1.4601

10.0

1.4566

11.0

1.4527

12.0

1.4463

12.5

1.4460

15.0

1.4325

20.0

1.3947

30.0

1.2626


Internal Transmittance τ i (λ) vs. Wavelength λ


Wavelength, Microns

Internal Transmittance

0.2

0.89

0.5

0.98

1.0

0.98

3.0

0.98

5.0

0.98

6.0

0.98

7.0

0.98

8.0

0.98

9.0

0.98

10.0

0.98

12.0

0.98

15.0

0.95

20.0

0.68


Custom sizes and specifications are available on request.


 

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