Oligoclase

Refractive Index: 1.5444
Abbe Number: 61.6
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 1

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.5444

V_{D}

= 61.6

n^{2} = 1 + \frac{λ ^{2}}{0.7433 ( λ ^{2} - 0.009956 )}

Absorption Specimens

Canada, Ontario (Hastings County), Bancroft District (Madawaska Mine)

India, Tamil Nadu State, Coimbatore