High‐Pressure Synthesis and Phase Stability of Nickel Pernitride
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2019-08-16 |
| Journal | European Journal of Inorganic Chemistry |
| Authors | Ken Niwa, Riku Fukui, Toshiki Terabe, Takuya Kawada, Daiki Kato |
| Institutions | Nagoya University |
| Citations | 30 |
Abstract
Section titled “Abstract”The high‐pressure nitridation of nickel was investigated using a laser‐heated diamond‐anvil cell. Marcasite‐type nickel pernitride (NiN 2 ) was synthesized at approximately 40 GPa, and it transformed into the tetragonal phase at approximately 3 GPa along with the decompression. The structural refinement of marcasite‐type NiN 2 at 36 GPa gives an N‐N distance of 1.24 Å. The first‐principles calculation reveals that the marcasite‐type NiN 2 is a narrow‐gap semiconductor, and high‐pressure in‐situ X‐ray diffraction measurements revealed a zero‐pressure bulk modulus of 172(6) GPa. The axial ratios (c/a and b/a) of marcasite‐type NiN 2 are close to the upper‐limit values of marcasite‐type structures, which suggests that the stability of marcasite‐type transition metal pernitrides strongly depends on the d ‐electrons.