The equation of state of 5-nitro-2,4-dihydro-1,2,4,-triazol-3-one determined via in-situ optical microscopy and interferometry measurements

摘要: Quasi-hydrostatic high-pressure equations of state (EOS) are typically determined, for crystalline solids, by measuring unit-cell volumes using x-ray diffraction (XRD) techniques. However, when characterizing low-symmetry materials with large unit cells, conventional XRD approaches may become problematic. To overcome this issue, we examined the utility a “direct” approach toward determining high pressure material volume surface area and sample thickness optical microscopy interferometry (OMI), respectively. We have validated experimental comparing results obtained 2,4,6-triamino-1,3,5-trinitrobenzene TATB an EOS determined from synchrotron XRD measurements; and, good match is observed. measured pressure EOS 5-nitro-2,4-dihydro-1,2,4,-triazol-3-one (α-NTO) up to 28 GPa. No high-pressure XRD EOS data been published on α-NTO, probably due its complex crystal structure. The study suggest that OMI reliable an...