The pressure/temperature and reaction phase diagram for dinitro azetidinium dinitramide (DNAZ-DN) has been delineated using a high-pressure diamond anvil cell with Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and optical polarizing light microscopy. The phase diagram was determined between ambient pressure and 10.0 GPa over the temperature range from −75 °C to decomposition temperatures or >150 °C. The phase diagram delineates the melt curve for α-DNAZ-DN, a reversible phase transformation in α-DNAZ-DN forming a new high-pressure polymorph, β-DNAZ-DN, and also identifies the pressure and temperature conditions for solid state decomposition of β-DNAZ-DN. FTIR and Raman spectra were obtained for both the α and β phases as a function of pressure at room temperature. The new high-pressure β polymorph could not be retrieved to ambient conditions.
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Russell et al. (1997) studied this question.
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