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Magnesium Fluoride vs. Gallium Arsenide

Both magnesium fluoride and gallium arsenide are non-glass optical ceramics. There are 12 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 130
85
Poisson's Ratio 0.27
0.31

Thermal Properties

Melting Onset (Solidus), °C 1260
1400
Specific Heat Capacity, J/kg-K 980
360
Thermal Conductivity, W/m-K 28
47
Thermal Expansion, µm/m-K 11
5.6

Otherwise Unclassified Properties

Density, g/cm3 3.2
5.3
Light Transmission Range, µm 0.12 to 7.0
1.0 to 16
Refractive Index 1.4
3.4

Common Calculations

Stiffness to Weight: Axial, points 22
8.9
Stiffness to Weight: Bending, points 52
28
Thermal Diffusivity, mm2/s 8.8
25