RefractiveIndex.INFO
Refractive index database
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Wavelength: µm  (0.2~2.2)
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Refractive index and related constants - CaCO3 (Calcite)
Refractive index at 0.5876 µm

Refractive index - Wikipedia

n = 1.65864

dn/dλ at 0.5876 µm

dn/dλ = -0.0699 µm-1

Abbe numbers

Abbe number - Wikipedia

Vd = 48.54

Ve = 48.34

Formulae    Abbe diagram
Chromatic dispersion curve

Dispersion (optics) - Wikipedia

[ Figure: Refractive index of CaCO3 (Calcite) ]
Dispersion formula

Sellmeier equation - Wikipedia

n2 - 1 = C1λ2/(λ2-C22) + C3λ2/(λ2-C42) + C5λ2/(λ2-C62) + C7λ2/(λ2-C82)

C1 = 0.8559; C2 = 0.0588; C3 = 0.8391; C4 = 0.141; C5 = 0.0009; C6 = 0.197; C7 = 0.6845; C8 = 7.005

C

n = sqrt( 1 + 0.8559*pow(x,2)/(pow(x,2)-pow(0.0588,2)) + 0.8391*pow(x,2)/(pow(x,2)-pow(0.141,2)) + 0.0009*pow(x,2)/(pow(x,2)-pow(0.197,2)) + 0.6845*pow(x,2)/(pow(x,2)-pow(7.005,2)) );

Fortran

n = SQRT( 1 + 0.8559*x**2/(x**2-0.0588**2) + 0.8391*x**2/(x**2-0.141**2) + 0.0009*x**2/(x**2-0.197**2) + 0.6845*x**2/(x**2-7.005**2) )

Visual Basic

n = SQR( 1 + 0.8559*x^2/(x^2-0.0588^2) + 0.8391*x^2/(x^2-0.141^2) + 0.0009*x^2/(x^2-0.197^2) + 0.6845*x^2/(x^2-7.005^2) )

Expressions for n

Reflection and related optical constants - CaCO3 (Calcite)

Angle of incidence (0~90°): 

Direction: in out

Source of refractive index data

- Handbook of Optics, Vol. 2, 2nd edition. McGraw-Hill 1994 [link]