CaF2 CORSTEC

CaF2

Calcium Fluoride (CaF2-) is grown by vacuum Stockbarger technique in diameter up to about 200mm. Calcium fluoride single crystal is an optical material with high transmittance in ultraviolet, visible and infrared regions of the spectrum . It is used in laser, IR, UV optics as prisms, lens, windows, etc.

Physical Properties

Structure	Cubic
Lattice constant	5.462
Cleavage	(111)
Density	3.18g/cm3
Mohs hardness	4
Young's modulus	146.1GPa direction(100) 89.8 GPa direction(111)
Melting point	1360℃
Thermal expansion coefficent	(16.2-19.4) x10-6/℃
Thermal conductivity at 36℃	9.71W/m?K

Refractive index

Wavelength(μm)	index	Wavelength(μm)	index
0.2	1.4951	6	1.3856
0.5	1.4365	7	1.3693
1	1.4289	8	1.3498
2	1.4239	9	1.3268
3	1.4179	10	1.3002
4	1.4069	11	1.2676
5	1.3990	12	1.2299