SF6 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.805182 n_e = 1.812649	V_d = 25.43 V_e = 25.23	n_F - n_C = 0.031660 n_F' - n_C' = 0.032201	Coloring: 0.42 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.72448482 C2 = 0.390104889 C3 = 1.04572858 C4 = 0.0134871947 C5 = 0.0569318095 C6 = 118.557185

Refraction index
n _2.3254	1.753019
n _1.9701	1.758128
n _1.5296	1.764444
n _1.06	1.773797
n _t	1.775170
n _s	1.781565
n _r	1.791166
n _C	1.796091
n _C'	1.797503
n _0.6328	1.798835
n _D	1.804908
n _d	1.805182
n _e	1.812649
n _F	1.827752
n _F'	1.829704
n _g	1.847072
n _h	1.864364
n _i	1.897025
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6608
P_C,A'	0.3050
P_d,C	0.2871
P_e,C	0.5229
P_g,d	1.3231
P_g,F	0.6102
P_h,g	0.5461
P_i,g	1.5777
P_C',t	0.7053
P_e,C'	0.4783
P_F',e	0.5386
P_i,F'	2.1263

transmittance: 10 mm
τ_2.5	0.88
τ_2.3254	0.91
τ_1.9701	0.971
τ_1.5296	0.996
τ_1.06	0.999
τ_0.7	0.998
τ_0.66	0.998
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.995
τ_0.46	0.99
τ_0.4358	0.98
τ_0.42	0.963
τ_0.4047	0.92
τ_0.4	0.9
τ_0.39	0.84
τ_0.38	0.69
τ_0.37	0.43
τ_0.365	0.28

transmittance: 25 mm
τ_2.5	0.73
τ_2.3254	0.8
τ_1.9701	0.93
τ_1.5296	0.991
τ_1.06	0.997
τ_0.7	0.995
τ_0.66	0.994
τ_0.62	0.994
τ_0.58	0.994
τ_0.54607	0.994
τ_0.5	0.988
τ_0.46	0.975
τ_0.4358	0.95
τ_0.42	0.91
τ_0.4047	0.82
τ_0.4	0.77
τ_0.39	0.65
τ_0.38	0.4
τ_0.37	0.12
τ_0.365	0.04

Density: 5.18 g/cm³
Poisson coef.: 0.244
Young module: 550 Pa*10⁸
Knoop hardness: 370
Optical stress coef.: 0.65 1/Pa*10¹²

Climatic resistance: 2
Staining: 3
Resistance to acids: 51.3
Resistance to alkalis: 2.3
Phosphate resistance: 3.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	81
20 ~ 300	90

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		3.7
20 ~ 40		5.3
60 ~ 80		6.1
-40 ~ -20	e	7.4
20 ~ 40	e	9.5
60 ~ 80	e	10.6
-40 ~ -20	g	11.9
20 ~ 40	g	14.6
60 ~ 80	g	16.1

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		6.1
20 ~ 40		6.8
60 ~ 80		7.3
-40 ~ -20	e	9.9
20 ~ 40	e	11.1
60 ~ 80	e	11.8
-40 ~ -20	g	14.5
20 ~ 40	g	16.2
60 ~ 80	g	17.4