General Diamond Properties
Specifications and qualities of diamond
Thermal Expansion Coefficient
Thermal Shock Parameter
Coefficient of Friction
Optical Index of Refraction
Optical Transmissivity Range
Optical Absorption Coefficient
Loss Tangent at 40 Hz
Loss Tangent at 140 GHz
Electron Saturated Velocity
Hole Saturated Velocity
400–800 MPa at <1 mm thickness
1.77 x 1023 atoms/cm³
1.1–5.0 (300-1300K) ppm/K
2.41 (at 591 nm)
225 nm to far IR
0.02–0.03 at 10 microns
0.05–0.3 at 10 microns
small and negative on  surface
The many unique advantages of diamond
At 10 on the Mohs scale diamond is four times harder than corundum such as sapphire and ruby. Diamond is highly resistant to scratching and abrasion. It is also chemically inert and resistant to extremely corrosive, radioactive, high temperature environments.
Diamond’s transmission range exceeds that of all traditional IR window materials.
Optically, diamond has the widest transmission band of all known materials, from 220nm to over 50µm, covering UV, visible, infrared, terahertz, and microwave spectral ranges.
With a thermal conductivity of 2000 W/mK diamond exceeds copper by a factor of five while also being electrically insulating.
Its large electronic bandgap of 5.45 eV allows diamond to withstand high electric fields and to be used in hazardous and radiation intense environments.
High intrinsic electron and hole mobility allows electronic charges to travel through the diamond structure with relative ease, which is ideal for high-frequency electronics.
Seki Diamond Systems provides a broad selection of systems for producing synthetic diamonds and diamond films for a spectrum of applications.
SEM of CVD diamond film grown on Seki Diamond systems at the Melbourne Centre for Nanofabrication
SEM of microcrystalline diamond film, courtesy of Oliver Williams, Cardiff Univ.
Brilliant cut single-crystal CVD diamond, about 2.5mm high, grown in about 1 day at the Carnegie Institution's Geophysical Laboratory, Washington, D.C.