Rhodonite

Refractive Index: 1.7245–1.7353
Abbe Number: 45.4–49.7
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 3

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.7353

V_{D}

= 48.9

n^{2} = 1 + \frac{λ ^{2}}{0.5165 ( λ ^{2} - 0.012972 )}

Fit #2— Specimen fit

Shannon / Cauchy

$n$

n

= 1.7245

V_{D}

= 49.7

n^{2} = 1 + \frac{λ ^{2}}{0.5259 ( λ ^{2} - 0.01274 )}

Fit #3— Specimen fit

Shannon / Cauchy

$n$

n

= 1.7274

V_{D}

= 45.4

n^{2} = 1 + \frac{λ ^{2}}{0.5251 ( λ ^{2} - 0.013902 )}

Absorption Specimens

Australia, New South Wales State (Yancowinna County), Broken Hill