Barite

Refractive Index: 1.6404
Abbe Number: 69.5
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 1

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.6404

V_{D}

= 69.5

n^{2} = 1 + \frac{λ ^{2}}{0.6072 ( λ ^{2} - 0.009058 )}

Absorption Specimens

Kenya, Rift Valley Province, Lake Magadi

Namibia, Oshikoto Region, Tsumeb (Tsumeb Mine)

United Kingdom, North-West Region, Cumbria

United States, Colorado (Weld County), Stoneham (Sterling Mine)