title: Discovery of the last remaining binary platinum-group pernitride RuN₂.
abstract: The last remaining marcasite-type RuN2 was successfully synthesized by direct chemical reaction between ruthenium and molecular nitrogen above the pressure of 32 GPa. For the first time, we found that Ru 4d is weakly hybridized with N 2p in the structure by using transmission electron microscopy equipped with electron-energy-loss spectroscopy. Our finding give important knowledge about the platinum-group pernitride with respect to the chemical bonding between platinum-group element and nitrogen.
authors.affiliation: Department of Crystalline Materials Science, Nagoya University, Furo-cho, Chikusa-ku, 464-8603 Nagoya (Japan), Fax: (+81) 52-789-3252. niwa@numse.nagoya-u.ac.jp.
authors.forename: Ken
authors.initials: K
authors.lastname: Niwa
authors.forename: Kentaro
authors.initials: K
authors.lastname: Suzuki
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Muto
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Tatsumi
authors.forename: Kazuo
authors.initials: K
authors.lastname: Soda
authors.forename: Takumi
authors.initials: T
authors.lastname: Kikegawa
authors.forename: Masashi
authors.initials: M
authors.lastname: Hasegawa
keywords: density functional calculations; high-pressure synthesis; laser-heated diamond-anvil cell; nitrides; ruthenium