| Hardeness | 5.5-6.5 Mohs' Scal 570 KHN 100 |
| Design Tensile Strength | 4.8x107 Pa (N/mm2) (7000psi) |
| Design Compressive Strength | >1.1x109 Pa (160,000 psi) |
| Bulk Modulus | 3.7x1010 Pa (5.3x106psi) |
| Rigidity Modulus | 3.1x1010 pa (4.5x106psi) |
| Young's Modulus | 7.2x10-10 pa (10.5x106 psi) |
| Poisson's Ratio | 0.17 |
| Coefficient of Thermal Expansion | 5.5x10-7cm/cm. °C (20°C-30°C) |
| Thermal Conductivity | 1.4 W/m. °C |
| Specific Heat | 670J/kg. °C |
| Softerning Point | 1683°C |
| Annealing Point | 1215°C |
| Strain Point | 1120°C |
| Electrical Receptivity | 7x107 ohm.cm (350°C) |
| Velocity of Sound-Shear Wave | 3.75x103 m/s |
| Velocity of Sound/ Compression Wave | 5.9x103 m/s |
| Sonic Attenuation | <11db/m MHZ |
| Chemical Stability (except hydrofuoric) | High resistance to water and acids |
Dielectric Properties (20°C and 1MHZ)
Constant
Strength
Loss Factor
Dissipation Factor |
3.75
5x107 V/M
Less than 4x10-4
Less than 1x10-4 |