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Barium Fluoride vs. Magnesium Fluoride

Both barium fluoride and magnesium fluoride are non-glass optical ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is barium fluoride and the bottom bar is magnesium fluoride.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 60
130
Poisson's Ratio 0.32
0.27
Shear Modulus, GPa 25
76

Thermal Properties

Melting Onset (Solidus), °C 1370
1260
Specific Heat Capacity, J/kg-K 420
980
Thermal Conductivity, W/m-K 9.0
28
Thermal Expansion, µm/m-K 18
11

Otherwise Unclassified Properties

Density, g/cm3 4.9
3.2
Light Transmission Range, µm 0.15 to 13
0.12 to 7.0
Refractive Index 1.6
1.4

Common Calculations

Stiffness to Weight: Axial, points 6.8
22
Stiffness to Weight: Bending, points 27
52
Thermal Diffusivity, mm2/s 4.4
8.8