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Calcium Fluoride vs. Soda-lime Glass

Calcium fluoride belongs to the non-glass optical ceramics classification, while soda-lime glass belongs to the glass and glass-ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is calcium fluoride and the bottom bar is soda-lime glass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 80
70 to 71
Knoop Hardness 160
570
Poisson's Ratio 0.26
0.23
Shear Modulus, GPa 34
29

Thermal Properties

Specific Heat Capacity, J/kg-K 860
720 to 800
Thermal Conductivity, W/m-K 9.7
1.0 to 1.1
Thermal Expansion, µm/m-K 19
8.8 to 9.0

Otherwise Unclassified Properties

Density, g/cm3 3.2
2.4
Light Transmission Range, µm 0.15 to 9.0
0.35 to 2.5
Refractive Index 1.4
1.5

Common Calculations

Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 45
56
Thermal Diffusivity, mm2/s 3.5
0.51 to 0.6