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Calcite Crystals

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Material Calcite Crystals Wavelength 350-2300nm
Size  (mm) 0.2-60mm Flatness λ/8
Surface Quality 20/10 S/D Clear Aperture > 95% of full aperture
Parallelism <10 arc sec Optical Axis Orientation < 6 arc min
Coating Upon customer's request

Basic Properties:

Density 2.7 g/cm3 Melting Point 730℃
Mohs Hardness 3 Transparency Range 350-2300nm
Thermal Expansion Coefficients(/℃) aa=24.39×10-6/K


Refractive Index no = 2.260 n3 = 2.142
Damage Threshold >1GW/cm2 Sellmeier Equation (λ in μm) no2=2.69705 + 0.0192064/(λ2-0.01820) - 0.0151624λ2

ne2=2.18438 + 0.0087309/(λ2-0.01018) - 0.0024411λ2

Calcite is a negative uniaxial crystal that has high birefringence, wide spectral transmission and availability in reasonably sized rhombs. Although is a fairly soft crystal and is easily scratched, it is ideal material used as visible and near IR polarizers, such as Glan Thompson, and Glan Taylor Glan laser.