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Forsterite (Mg2SiO4)

Forsterite is an oxide-based engineering ceramic.

The properties of forsterite include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare forsterite to other oxide-based engineering ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Thermal Properties

Specific Heat Capacity

850 J/kg-K 0.2 BTU/lb-°F

Thermal Conductivity

1.7 to 3.5 W/m-K 1.0 to 2.0 BTU/h-ft-°F

Thermal Expansion

9.0 to 10 µm/m-K

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz


Dielectric Strength (Breakdown Potential)

7.9 kV/mm 0.31 V/mil

Electrical Dissipation At 1 MHz


Other Material Properties


2.1 to 3.1 g/cm3 130 to 200 lb/ft3

Flexural Strength

40 to 160 MPa 5.8 to 23 x 103 psi

Common Calculations

Thermal Diffusivity

0.94 to 1.3 mm2/s

Followup Questions

Further Reading

ASTM C242: Standard Terminology of Ceramic Whitewares and Related Products

IEC 60672-3: Ceramic and glass-insulating materials - Part 3: Specifications for individual materials

Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005