Titanite

Refractive Index: 1.9085–1.9712
Abbe Number: 20.9–34.1
Crystal System: Isotropic (cubic)
Formation: Natural
Dispersion Data: Measured (published fit)
Fits: 8

Refraction Fits

Fit #1

Shannon / Cauchy

$n$

n

= 1.9612

V_{D}

= 23.0

n^{2} = 1 + \frac{λ ^{2}}{0.3813 ( λ ^{2} - 0.027275 )}

Fit #2— Specimen fit

Shannon / Cauchy

$n$

n

= 1.9103

V_{D}

= 22.1

n^{2} = 1 + \frac{λ ^{2}}{0.4106 ( λ ^{2} - 0.028008 )}

Fit #3— Specimen fit

Shannon / Cauchy

$n$

n

= 1.9333

V_{D}

= 34.1

n^{2} = 1 + \frac{λ ^{2}}{0.3863 ( λ ^{2} - 0.018897 )}

Fit #4— Specimen fit

Shannon / Cauchy

$n$

n

= 1.9267

V_{D}

= 27.5

n^{2} = 1 + \frac{λ ^{2}}{0.3949 ( λ ^{2} - 0.023044 )}

Fit #5— Specimen fit

Shannon / Cauchy

$n$

n

= 1.9185

V_{D}

= 20.9

n^{2} = 1 + \frac{λ ^{2}}{0.4076 ( λ ^{2} - 0.029441 )}

Fit #6— Specimen fit

Shannon / Cauchy

$n$

n

= 1.9712

V_{D}

= 22.7

n^{2} = 1 + \frac{λ ^{2}}{0.3765 ( λ ^{2} - 0.027623 )}

Fit #7— Specimen fit

Shannon / Cauchy

$n$

n

= 1.9591

V_{D}

= 29.7

n^{2} = 1 + \frac{λ ^{2}}{0.3757 ( λ ^{2} - 0.02156 )}

Fit #8— Specimen fit

Shannon / Cauchy

$n$

n

= 1.9085

V_{D}

= 26.4

n^{2} = 1 + \frac{λ ^{2}}{0.4064 ( λ ^{2} - 0.023868 )}

Absorption Specimens

Brazil, Minas Gerais State, Capelinha (Campo do Boa Mine)

India, Orissa State

India, Tamil Nadu State, Mettur

Kenya, Eastern Province, Archer's Post

Mexico, Baja California State

Mexico, Baja California State

Mexico, Baja California State

Mexico, Baja California State (Ensenada Municipality), (El Alamo Mine)

Mexico, Baja California State (Ensenada Municipality), (El Alamo Mine)

Mexico, Baja California State (Ensenada Municipality), (El Alamo Mine)

Mexico, Baja California State (Ensenada Municipality), (El Alamo Mine)

Switzerland, Ticino Canton (Maggia Valley District), Lavizzara Valley (Lake Naret)