Researchers at Tsukuba University have created a harder artificial diamond than natural. The material was called penta diamond.
Researchers at Tsukuba University used computer calculations to create a new carbon-based material, even harder than diamond. This structure, which the creators called the “penta diamond”, can be useful for replacing modern synthetic diamonds in complex production tasks.
Carbon can form many stable configurations called allotropes. These include familiar graphite in pencil lead, as well as nanomaterials such as carbon nanotubes. The mechanical properties, including hardness, of an allotrope depend mainly on how its atoms are bonded to each other. In ordinary diamonds, each carbon atom forms a covalent bond with four neighbors. Now researchers at Tsukuba University have arranged atoms in a more complex structure with a mixture of hybridization.