Theoretical calculations suggest that HD [hexagonal diamond] may even surpass cubic diamond (CD), the hardest and least compressible material known in nature today.

Pyrite (or fool’s gold) has an atomic structure similar to sodium chloride and expresses in dramatic cubic crystals.

Rare diamonds found in meteorites called ureilites have a folded hexagonal structure. Learning the process of how they were formed could inspire better lab-grown diamonds.

a, An FESEM image of a cut in a (111)-oriented cubic mesoporous titania film. Both the hexagonal top surface and the cubic pore structure can be seen. b, A tapping-mode AFM image of the hexagonal ...

For the first time, researchers have hard evidence that human-made hexagonal diamonds are stiffer than cubic diamonds found in nature and often used in jewelry. Hexagonal diamonds have been found ...

Space & Spaceflight Weird Hexagonal Diamonds Came From an Asteroid-Dwarf Planet Smashup The diamonds’ unusual crystal structure may make them harder than ordinary diamonds.

To test the extent of the phase transition from hexagonal to cubic crystalline structure, the AFM nanoscopic tip probe simultaneously applies pressure and measures the material elasticity.

Hexagonal diamonds, like regular diamonds, are made of carbon, but their atoms are arranged in a hexagonal structure rather than a cubic one.

On very fast compression time scales, material kinetics hinder the transition from graphite to the equilibrium cubic diamond crystal structure that we commonly know as diamond.