High-pressure synthesis of ultraincompressible hard rhenium nitride pernitride Re₂(N₂)(N)₂ stable at ambient conditions.

ABSTRACT: High-pressure synthesis in diamond anvil cells can yield unique compounds with advanced properties, but often they are either unrecoverable at ambient conditions or produced in quantity insufficient for properties characterization. Here we report the synthesis of metallic, ultraincompressible (K₀ = 428(10) GPa), and very hard (nanoindentation hardness 36.7(8) GPa) rhenium nitride pernitride Re₂(N₂)(N)₂. Unlike known transition metals pernitrides Re₂(N₂)(N)₂ contains both pernitride N₂^4- and discrete N^3- anions, which explains its exceptional properties. Re₂(N₂)(N)₂ can be obtained via a reaction between rhenium and nitrogen in a diamond anvil cell a

SUBMITTER: Bykov M 

PROVIDER: S-EPMC6611777 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature