Scapolite

Refractive Index: 1.5529–1.5794
Abbe Number: 59.0–64.3
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 6

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.5529

V_{D}

= 59.0

n^{2} = 1 + \frac{λ ^{2}}{0.7303 ( λ ^{2} - 0.010407 )}

Fit #2— Specimen fit

Shannon / Cauchy

$n$

n

= 1.5723

V_{D}

= 62.6

n^{2} = 1 + \frac{λ ^{2}}{0.6991 ( λ ^{2} - 0.00987 )}

Fit #3— Specimen fit

Shannon / Cauchy

$n$

n

= 1.5752

V_{D}

= 59.6

n^{2} = 1 + \frac{λ ^{2}}{0.6958 ( λ ^{2} - 0.010348 )}

Fit #4— Specimen fit

Shannon / Cauchy

$n$

n

= 1.5794

V_{D}

= 59.1

n^{2} = 1 + \frac{λ ^{2}}{0.6898 ( λ ^{2} - 0.010438 )}

Fit #5— Specimen fit

Shannon / Cauchy

$n$

n

= 1.5623

V_{D}

= 60.3

n^{2} = 1 + \frac{λ ^{2}}{0.7151 ( λ ^{2} - 0.010208 )}

Fit #6— Specimen fit

Shannon / Cauchy

$n$

n

= 1.5741

V_{D}

= 64.3

n^{2} = 1 + \frac{λ ^{2}}{0.696 ( λ ^{2} - 0.009626 )}

Absorption Specimens

Brazil, Espírito Santo State

Myanmar, Mandalay Division, Mogok (Kathé)

Myanmar, Mandalay Division, Mogok (Kyatpyin)

Myanmar, Mandalay Division, Mogok (Kyatpyin)

Namibia, Oshikoto Region, Tsumeb (Tsumeb Mine)

Namibia, Oshikoto Region, Tsumeb (Tsumeb Mine)

Tanzania, Arusha Region, Lelatema Mountains