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氯化钠 Sodium Chloride (NaCl)


Crystallographic


Syngony

Cubic

Symmetry Class

m3m

Lattice Constants

a = 5.640 Å

c = a

Cleavability

(100), perfect


Optical


Refractive Index at ne

1.5467

Refractive Index at nF' - nC'

0.0132

Refractive Index at n10.6

1.4906

Refractive Index at n8.0 - n12.5

0.0308

Thermal Coefficient of Refractive Index at 3.39 microns for

±60 ℃

(-3.31) ... (-3.73) x 10-5

Transmission Range, microns

0.2 - 20


Thermal


Thermal Linear Expansion,

-1 for ±60 ℃

(36.4 ... 40.8) x 10-6

Thermal Conductivity, W/(m * ℃) at 35 ℃

6.15

Specific Heat Capacity, J/(kg * ℃)

0.871 x 103

Melting Point, ℃

801


Mechanical


Density, g/cm3 at 20 ℃

2.17

Mohs Hardness

3

Vickers Microhardness, Pa

20 x 107

Constants of Elastic Compliance,

Pa-1

S11 = 22.85 x 10-12 S12 = -4.69 x 10-12

S44 = 78.34 x 10-12

Young Modulus (E), Pa


in <100> direction

4.37 x 1010

in <111> direction

3.27 x 1010

Shear Modulus (G), Pa


in <100> direction

1.59 x 1010

in <111> direction

1.28 x 1010

Poisson Ratio

0.203


Chemical


Molecular Weight

58.45

Solubility


in water, gram/100cm3

35.7

in acids

soluble


Ref. Index vs. Wavelength λ


Wavelength, Microns

Refractive Index

0.2

1.7899

0.5

1.5516

1.0

1.5320

2.0

1.5254

3.0

1.5242

4.0

1.5217

5.0

1.5185

6.0

1.5153

7.0

1.5112

8.0

1.5066

9.0

1.5009

10.0

1.4947

11.0

1.4878

12.0

1.4800

12.5

1.4758

15.0

1.4403

20.0

1.3822

30.0

1.0912


Internal Transmittance τ i (λ) vs. Wavelength λ


Wavelength, Microns

Internal Transmittance

0.2

0.16

0.5

0.97

1.0

0.97

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

0.87

20.0

0.05


Custom sizes and specifications are available on request.


 

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