Synthesis of LaCN₃, TbCN₃, CeCN₅, and TbCN₅ Polycarbonitrides at Megabar Pressures.

ABSTRACT: Inorganic ternary metal-C-N compounds with covalently bonded C-N anions encompass important classes of solids such as cyanides and carbodiimides, well known at ambient conditions and composed of [CN]^- and [CN₂]^2- anions, as well as the high-pressure formed guanidinates featuring [CN₃]^5- anion. At still higher pressures, carbon is expected to be 4-fold coordinated by nitrogen atoms, but hitherto, such CN₄-built anions are missing. In this study, four polycarbonitride compounds (LaCN₃, TbCN₃, CeCN₅, and TbCN₅) are synthesized in laser-heated diamond anvil cells at pressures between 90 and 111 GPa. Synchrotron single-crystal X-ray diffraction (SCXRD) reveals that their crystal structu

SUBMITTER: Aslandukov A 

PROVIDER: S-EPMC11229003 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature