PROPERTIES of Calcium Fluoride (CaF2)

MECHANICAL PROPERTIES
Young Modulus : 75.79 GPa
Shear Modulus : 33.76 GPa
Bulk Modulus : 83.03 GPa
Knoop Hardness : 1.6 GPa
Mohs Hardness : 4
Modulus of Rupture : 36.5 MPa
Poisson's Ratio : 0.28
Elastic Coefficients : C11=164; C12=53; C44=33.7
Apparent Elastic Limit : 36.54 MPa
Solubility : 0.0017g in 100g of water @ 23°C
Density : 3.18 g/cm3

THERMAL PROPERTIES
Melting Point : 1360°C
Specific Heat : 0.204 cal/(g·°C) @ 0°C
Thermal Expansion Coefficient : 18.85x10-6 °C-1
Thermal Conductivity : 9.71 W/(m·°C) @ 36°C

ELECTRICAL PROPERTIES
Dielectric Constant for 105Hz : 6.76

OPTICAL PROPERTIES
Transmission Range : 0.13...9μm
Transmittance : 90% (0.3...7μm; 3mm thick)
Refractivity : 1.39908 @ 5μm
Cleavage Plane : (111)