氯化钾 Potassium Chloride (KCl)

Syngony

Cubic

Symmetry Class

m3m

Lattice Constants

a = 6.292 Å   c = a

Cleavability

(100), perfect

Refractive Index at n_e

1.4930

Refractive Index at n_F' - n_C'

0.0112

Refractive Index at n_10.6

1.4546

Refractive Index at n_8.0 - n_12.5

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 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

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

Molecular Weight

74.55

Solubility

in water, gram/100 cm³

34.7

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

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