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Calcium Fluoride vs. Beryllia

Calcium fluoride belongs to the non-glass optical ceramics classification, while beryllia belongs to the oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is calcium fluoride and the bottom bar is beryllia.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 3.2
2.9
Elastic (Young's, Tensile) Modulus, GPa 80
350
Poisson's Ratio 0.26
0.26
Shear Modulus, GPa 34
180
Specific Heat Capacity, J/kg-K 860
1050
Stiffness to Weight: Axial, points 14
67
Stiffness to Weight: Bending, points 45
82
Thermal Conductivity, W/m-K 9.7
270
Thermal Diffusivity, mm2/s 3.5
89
Thermal Expansion, µm/m-K 19
8.0