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     CaF2
Home >> Optical Crystal >> CaF2 
Basic Properties
Crystal structure cubic
Lattice a=5.462
Density 3.18 g/cm3
Transmission Range 170 nm~7800 nm
Melting Point 1360¡ãC
Specific Heat
Thermal Conductivity 9.71W/m/K
Thermal Shock Resistance
Thermal Expansion Coefficient 18.85X10 -6 /K
dn/dt, @633nm
Mohs Hardness 6
Refractive Index 1.6921mm - 1.3161mm
Specifications of Windows and Mirrors
Diameter +/-0.0, -0.1mm
Thickness +/-0.2mm
Flatness better than ¦Ë per 25 @633nm
Parallelism better than 3'
Perpendicularity better than 5'
Scratch-Dig 80-50 per MIL-O-13830A
Wavefront Distortion less than l /2 per inch @1064nm