Crystal properties
Crystal Type	cubic, CaF2 type structure
Transmission Rang:	0.13 ... 12 µm
Density	3.18 g/cm3
Melting Point	1360, 1395 °C
Molecular Weight	78.0768
Thermal Conductivity	9.71 W/(m K)
Specific Heat:	854 J/(kg K)
Thermal Expansion	18.7; 18.85; 24.0 × 10–6 / K
Hardness (Knoop)	158.3
Young’s Modulus	75.8 GPa
Shear Modulu:	33.77 GPa
Bulk Modulus	82.71 GPa
Rupture Modulus	36.5 MPa
Elastic Coefficient:	C11 = 164 C12 = 53 C44 = 33.7 GPa
Dielectric Constant	6.76 @ 27 °C
Solubility in Wate:	0.0017 g / 100 g @ 20 °C
Cleavage Planes	(111)
Applicatio:	Spectroscopy, astronomy, lithography laser windows for Excimer lasers scintillators (CaF2:Eu)
Remarks	deliverable in IR, UV and DUV quality
List of optical crystals