Lonsdaleite, also Called Hexagonal Diamond, 58% Harder Than Regular Diamond
In the case of lonsdaleite [hexagonla diamond], compression mechanism also caused bond-flipping, yielding an indentation strength of 152 GPa, which is 58 percent higher than the corresponding value of diamond. viaPhysorg.com Under large compressive pressures, w-BN [wurtzite boron nitride] increases its strength by 78 percent compared with its strength before bond-flipping. The scientists calculated that …