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Basic Properties of Calcite Crystal
 

Transparency Range: 350 - 2300 nm

material-ca.GIF (10982 bytes)

Transmission Curve

Crystal Symmetry: Trigonal, R3c
Lattice Constants: a=b=4,994A, c=17,081A
Density:  2.71 g/cm3
Damage Threshold ( 10ns, 10Hz)
at 1064 nm - 100 MW/cm2
at 532 nm - 50 MW/cm2
Optical Homogeneity: Δn < 10-6/cm
Mohs Hardness: 3
Thermal Expansion Coefficients: αa = 4.9 x 10-6/K
αc =  25.1 x 10-6/K
Linear Absorption Coefficients: α<0.01cm-1 from 400 to 700 nm

Sellmeier Equations: (λ in m) :
  no2=2.69705 + 0.0192064/(λ2-0.01820)-0.0151624λ2 
  ne2=
2.18438 + 0.0087309/(λ2-0.01018)-0.0024411λ2

 Wavelength(nm) no ne Birefringence
(Δn=ne-no)
Walk-off Angle
 at 45
1064 1.6423 1.4797 -0.162 5.93
800 1.6487 1.4821 -0.166 6.06
632.8 1.6557 1.4852 -0.171 6.18
532 1.6629 1.4886 -0.174 6.30
400 1.6823 1.4974 -0.185 6.61
355 1.6951 1.5032 -0.192 6.82
266 1.7497 1.5259 -0.224 7.74

* Calcite crystal is a natural mined material, not synthetic material.  Defects in a calcite crystal ( a large crystal in particular ) can cause scattering and absorption within the bulk. 


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