Pressure-induced phase transition of 1,5-diamino-1H-tetrazole (DAT) under high pressure.

ABSTRACT: Nitrogen-rich energetic materials have attracted certain interest as promising high energy density materials (HEDMs) in recent years. Pure N₂ and nitrogen-based molecular crystals are ideal HEDMs that would polymerize under high pressure, as reported in previous literature. We selected a 1,5-diamino-1H-tetrazole (DAT) crystal, which has two kinds of molecular structures and hydrogen bonds, to study under high pressure by spectroscopy and diffraction due to its high nitrogen percentage and low sensitivities. Pressure-induced structure transitions occur at pressures of 2.3-6.6 GPa, ∼8.5 GPa, and ∼17.7 GPa. The phase transition at 2.3-6.6 GPa is related to the rotation of NH₂, and the latter two transitions are caused by both the rotation of NH₂ and the

SUBMITTER: Jin C 

PROVIDER: S-EPMC9056306 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature