Material | Density (g/cm^{3}) | Tensile strength (MPa) | Compressive strength (MPa) | Modulus (GPa) | Fracture toughness (MPa m^{1/2}) | Hardness (Knoop) | Mass fraction *α* (ppm/°C) | Fracture surface energy (J/m^{2}) | Poisson's ratio | Thermal conductivity (Wm^{−1}K^{−1}) |