OST Photonics CaF2 Crystals

Size

Upon the customer’s request

Diameter Tolerance

+0/-0.1 mm

Thickness Tolerance

+/-0.1 mm

Aperture

>90%

Surface Quality

80/50~10/5 (S/D)

Parallelism

<1 arc minute

Chamfer

0.2-0.5mmx45°

Coating

Uncoated or upon customer’s request

Refractive Index

1.39908 at 5 microns

Refractive Loss

5.4% at 5 micron

Crystal/Class Structure

Cubic CsCl, Pm3m

Cleavage Plane

No cleavage planes

Density

3.18 g/cc

Hardness(Knoop)

158.3 (100) with 500g indenter

Youngs Modulus

75.8 GPa

Shear Modulus

33.77 GPa

Bulk  Modulus

82.71 GPa

Poisson Ratio

0.26

Elastic Limit

C11=164 C12=53 C44=33.7

Molecular Weight

78.08

Thermal Expansion

47.9×10^-6 /℃ at 273K

Thermal Conductivity

9.71 W m^-1K^-1

Melting Point

1360 ℃

Specific Heat Capacity

854  J Kg^-1K^-1

Thermal Expansion

47.9×10^-6 /℃ at 273K

Solubility

0.0017 g/100g water at 20℃