High-pressure phase diagram of O2 and N2 binary system: formation of kagome-lattice of O2

18th APS-SCCM; 24th AIRAPT

Akahama, Y.^1 ; Maekawa, T.^1 ; Sugimoto, T.^1 ; Fujihisa, H.^2 ; Hirao, N.^3 ; Ohishi, Y.^3

Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigohri, Hyogo

678-1297, Japan^1

National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Ibaraki, Tsukuba

305-8565, Japan^2

Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Mikazuki, Sayo-gun, Hyogo

679-5198, Japan^3

关键词: Binary systems;    Composition ranges;    Hexagonal lattice;    High-pressure phase diagrams;    Magnetic lattice;    Phase relation;    Pressure compositions;    X-ray diffraction method;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/18/182001/pdf
DOI  :  10.1088/1742-6596/500/18/182001

来源: IOP

【 摘 要 】

High-pressure phase diagram of O2and N2binary system has been investigated using an x-ray diffraction method and the pressure-composition phase relation has been proposed up to 12 GPa. From the result, a hexagonal alloy phase reported previously was stable in relatively wide pressure and composition ranges. The structure of this phase was also determined to be a hexagonal lattice (space group: P6/mmm) with seven molecules in the unit cell from the Rietveld refinement. In this phase, formation of a new magnetic lattice of O2: the kagome-lattice has also been proposed.