Materials
/
Wulfenite
Wulfenite
Refractive Index
2.3615–2.3659
Abbe Number
11.7–13.2
Crystal System
Isotropic (cubic)
Formation
Natural
Dispersion Data
Measured (published fit)
Fits
4
Refraction Fits
Fit #1
Shannon / Cauchy
n
n
=
2.3659
V
D
=
12.2
n
400
450
500
550
600
650
700
750
2.200
2.300
2.400
2.500
2.600
2.700
n
2
=
1
+
0.2538
(
λ
2
−
0.049645
)
λ
2
Fit #2
— Specimen fit
Shannon / Cauchy
n
n
=
2.3628
V
D
=
13.2
n
400
450
500
550
600
650
700
750
2.300
2.400
2.500
2.600
2.700
n
2
=
1
+
0.2519
(
λ
2
−
0.046447
)
λ
2
Fit #3
— Specimen fit
Shannon / Cauchy
n
n
=
2.3634
V
D
=
12.6
n
400
450
500
550
600
650
700
750
2.200
2.300
2.400
2.500
2.600
2.700
n
2
=
1
+
0.2535
(
λ
2
−
0.048521
)
λ
2
Fit #4
— Specimen fit
Shannon / Cauchy
n
n
=
2.3615
V
D
=
11.7
n
400
450
500
550
600
650
700
750
2.200
2.300
2.400
2.500
2.600
2.700
n
2
=
1
+
0.2565
(
λ
2
−
0.051462
)
λ
2
Absorption Specimens
LED
SUN
I
F
Wulfenite
Namibia, Oshikoto Region, Tsumeb (Tsumeb Mine)
LED
SUN
I
F
Wulfenite
United States, Arizona (La Paz County), Trigo Mountains (Red Cloud Mine)
LED
SUN
I
F
Wulfenite
United States, Arizona (La Paz County), Trigo Mountains (Red Cloud Mine)