High-pressure chemistry of H-N-F ternary system

The high-pressure chemistry of binary N-Hal (Hal = F, Cl, Br, I) and H-Hal systems as well as the ternary H-N-Hal system is yet unknown. Although, the theoretical studies predict the formation of exotic H-Hal and N-Hal compounds at 20-180 GPa. Ammonium fluoride NH4F is a promising candidate to be used as a precursor for the synthesis of N-F, H-F, and H-N-F compounds. However, its stability and chemical reactivity under high-pressure high-temperature conditions has not been studied yet.
Here, we propose a single-crystal X-ray diffraction study of the H-N-F system at pressures up to 120 GPa at ID11. Ammonium fluoride NH4F and its mixture with N- or F-bearing precursor will be the objects of the proposed study. The aims of the proposed experiments are a synthesis of new N-F, H-F, and H-N-F compounds at megabar pressure, characterization of their crystal chemistry and behavior upon decompression, tests of theoretical predictions, and search for regularities in high-pressure chemistry.