N-SF6 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.805180 n_e = 1.812659	V_d = 25.35 V_e = 25.15	n_F - n_C = 0.031750 n_F' - n_C' = 0.032303	Coloring: 0.45 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.77931763 C2 = 0.338149866 C3 = 2.08734474 C4 = 0.0133714182 C5 = 0.0617533621 C6 = 174.01759

Refraction index
n _2.3254	1.748954
n _1.9701	1.755410
n _1.5296	1.763069
n _1.06	1.773414
n _t	1.774856
n _s	1.781442
n _r	1.791138
n _C	1.796078
n _C'	1.797493
n _0.6328	1.798826
n _D	1.804906
n _d	1.805180
n _e	1.812659
n _F	1.827829
n _F'	1.829796
n _g	1.847379
n _h	1.865062
n _i	1.899075
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6684
P_C,A'	0.3055
P_d,C	0.2866
P_e,C	0.5222
P_g,d	1.3291
P_g,F	0.6157
P_h,g	0.5569
P_i,g	1.6281
P_C',t	0.7129
P_e,C'	0.4776
P_F',e	0.5397
P_i,F'	2.1819

transmittance: 10 mm
τ_2.5	0.94
τ_2.3254	0.95
τ_1.9701	0.985
τ_1.5296	0.998
τ_1.06	0.998
τ_0.7	0.995
τ_0.66	0.992
τ_0.62	0.992
τ_0.58	0.992
τ_0.54607	0.988
τ_0.5	0.976
τ_0.46	0.958
τ_0.4358	0.94
τ_0.42	0.91
τ_0.4047	0.84
τ_0.4	0.8
τ_0.39	0.67
τ_0.38	0.46

transmittance: 25 mm
τ_2.5	0.85
τ_2.3254	0.88
τ_1.9701	0.962
τ_1.5296	0.994
τ_1.06	0.994
τ_0.7	0.987
τ_0.66	0.98
τ_0.62	0.979
τ_0.58	0.98
τ_0.54607	0.97
τ_0.5	0.94
τ_0.46	0.9
τ_0.4358	0.85
τ_0.42	0.78
τ_0.4047	0.64
τ_0.4	0.57
τ_0.39	0.37
τ_0.38	0.14

Density: 3.37 g/cm³
Poisson coef.: 0.262
Young module: 930 Pa*10⁸
Knoop hardness: 550
Optical stress coef.: 2.82 1/Pa*10¹²

Climatic resistance: 1
Staining: 0
Resistance to acids: 2
Resistance to alkalis: 1
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	90
20 ~ 300	104

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-3
20 ~ 40		-2.3
60 ~ 80		-2
-40 ~ -20	e	-1.2
20 ~ 40	e	0
60 ~ 80	e	0.6
-40 ~ -20	g	1.3
20 ~ 40	g	3.1
60 ~ 80	g	4.1

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.7
20 ~ 40		-0.8
60 ~ 80		-0.8
-40 ~ -20	e	1.2
20 ~ 40	e	1.5
60 ~ 80	e	1.8
-40 ~ -20	g	3.9
20 ~ 40	g	4.8
60 ~ 80	g	5.4