Synthesis of Ultra-Incompressible and Recoverable Carbon Nitrides Featuring CN₄ Tetrahedra.

ABSTRACT: Carbon nitrides featuring three-dimensional frameworks of CN₄ tetrahedra are one of the great aspirations of materials science, expected to have a hardness greater than or comparable to diamond. After more than three decades of efforts to synthesize them, no unambiguous evidence of their existence has been delivered. Here, the high-pressure high-temperature synthesis of three carbon-nitrogen compounds, tI14-C₃ N₄ , hP126-C₃ N₄ , and tI24-CN₂ , in laser-heated diamond anvil cells, is reported. Their structures are solved and refined using synchrotron single-crystal X-ray diffraction. Physical properties investigations show that these strongly covalently bonded materials, ultra-incompressible and superhard, also possess high e

SUBMITTER: Laniel D 

PROVIDER: S-EPMC11475261 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature