title: High pressure synthesis of marcasite-type rhodium pernitride.
abstract: Marcasite-type rhodium nitride was successfully synthesized in a direct chemical reaction between a rhodium metal and molecular nitrogen at 43.2 GPa using a laser-heated diamond-anvil cell. This material shows a low zero-pressure bulk modulus of K0 = 235(13) GPa, which is much lower than those of other platinum group nitrides. This finding is due to the weaker bonding interaction between metal atoms and quasi-molecular dinitrogen units in the marcasite-type structure, as proposed by theoretical studies.
authors.affiliation: Department of Crystalline Materials Science, Nagoya University , Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Niwa
authors.forename: Dmytro
authors.initials: D
authors.lastname: Dzivenko
authors.forename: Kentaro
authors.initials: K
authors.lastname: Suzuki
authors.forename: Ralf
authors.initials: R
authors.lastname: Riedel
authors.forename: Ivan
authors.initials: I
authors.lastname: Troyan
authors.forename: Mikhail
authors.initials: M
authors.lastname: Eremets
authors.forename: Masashi
authors.initials: M
authors.lastname: Hasegawa