Andalusite

Refractive Index: 1.6385
Abbe Number: 68.5
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 1

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.6385

V_{D}

= 68.5

n^{2} = 1 + \frac{λ ^{2}}{0.6097 ( λ ^{2} - 0.009185 )}

Absorption Specimens

Brazil, Espírito Santo State

Brazil, Espírito Santo State

Brazil, Espírito Santo State