Novel high-pressure phases of nitrogen-rich Y–N compounds

Pressure induced five novel Y–N compounds. The high energy density of P 1̄-II-YN 4 (1.98 kJ g −1 ), P 1̄-YN 6 (2.35 kJ g −1 ), and P 31 c -YN 8 (3.77 kJ g −1 ) and excellent explosive performance make them potential high energy density materials.