Property | Value | Units |
---|---|---|

Hardness | 10,000 | kg/mm^{2} |

Strength, tensile | >1.2 | GPa |

Strength, compressive | >110 | GPa |

Sound velocity | 18,000 | m/s |

Density | 3.52 | g/cm^{3} |

Young's modulus | 1220 | GPa |

Poisson's ratio | 0.2 | Dimensionless |

Thermal expansion coefficient | 0.0000011 | /K |

Thermal conductivity | 20.0 | W/cm-K |

Thermal shock parameter | 30,000,000 | W/m |

Debye temperature | 2,200 | K |

Optical index of refraction (at 591 nm) | 2.41 | Dimensionless |

Optical transmissivity (from nm to far IR) | 225 | Dimensionless |

Loss tangent at 40 Hz | 0.0006 | Dimensionless |

Dielectric constant | 5.7 | Dimensionless |

Dielectric strength | 10,000,000 | V/cm |

Electron mobility | 2,200 | cm^{2}/V-s |

Hole mobility | 1,600 | cm^{2}/V-s |

Electron saturated velocity | 27,000,000 | cm/s |

Hole saturated velocity | 10,000,000 | cm/s |

Work function | small and negative | On [111] surface |

Bandgap | 5.45 | eV |

Resistivity | 10^{13} - 10^{16} | Ohm-cm |