Sinhalite

Refractive Index: 1.6890
Abbe Number: 72.0
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 1

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.6890

V_{D}

= 72.0

n^{2} = 1 + \frac{λ ^{2}}{0.5539 ( λ ^{2} - 0.008846 )}

Absorption Specimens

Sri Lanka, Sabaragamuwa Province, Eheliyagoda

Sri Lanka, Sabaragamuwa Province, Eheliyagoda

Sri Lanka, Sabaragamuwa Province, Eheliyagoda

Sri Lanka, Sabaragamuwa Province, Ratnapura