A team of researchers has reported the first laboratory synthesis and recovery of bulk hexagonal diamond, a crystal form long predicted to be harder than the conventional gems used in cutting tools ...

“These findings resolve the long-standing controversy on the existence of hexagonal diamond,” researchers said.

After decades of debate, researchers say that they have found the clearest evidence yet for this rare form of carbon.

Diamonds are famous for their strength, but scientists have long suspected that another form of diamond might be even harder. Evidence of this was gathered over the past sixty years in meteorite ...

After decades of debates over the existence and properties of one of the world’s ...

Although the optically transparent single-crystal ZrO 2 form has a very high thermal shock resistance, it also has poor fracture toughness and strength. Zirconia is well-known among ceramics for being ...