The compression of solid N2 at 296 K from 5 to 10 GPa

The volume of solid N2 having Pm3n space group was measured at 296 K from 5 to 10 GPa using a high pressure, x-ray diffraction technique. The compression of NaF was used as the pressure gauge. From a fit of the compression of the Pm3n structure data converted to the velocity plane, the volumes and bulk moduli are calculated as a function of pressure. From this fit and simultaneous volume measurements of the β-N2 phase and the Pm3n structure, the pressure of transformation from the β-N2 phase to the Pm3n structure is found to be 4.8 GPa. Recently published a priori calculations are shown to agree well with the present data.